Physics Dictionary

A To Z Physics Dictionary

A physics A to Z dictionary like this helps physics students, teachers, and students to search, compare and revise large numbers of terms at once. This physics glossary is a list of definitions of physics, its subfields, and related fields.

a to z physics dictionary

accelerate the action of changing the speed of a movement.
acoustics: Part of Physics that deals with sounds and related phenomena. Determination of the relationships of harmonic intervals, discovering the properties of vibrating strings.
adiabatic: it is the name given to the curve of the pressure by volume diagram that expresses an adiabatic transformation, that is, with the amount of heat of the gas conserved.
adiabatic: Thermodynamic transformation that takes place without the body or the system losing or gaining any amount of heat. Coordinate curve, selected to represent pressure and volume or temperature and entropy of matter during an adiabatic process. a to z physics dictionary
altitude: Height vertically from a place above sea level.
ammeter: Instrument for measuring the electric current.
amp: Practical unit of electrical measurement corresponding to the intensity of an electric current that, with the electromotive force of 1 volt, travels through a circuit with a resistance of 1 ohm. a to z physics dictionary
angle: Figure formed by two semi-straight lines that start from the same point.
angstrom: It is the measure commonly used to deal with magnitudes of the order of the atom or of the spacing between two crystalline planes. 1 Å = 10 -10 m
anion: Negatively charged ion.
approximation: Calculation, value not absolutely exact, but as close as possible.
astronomical unit: Unit of length used in Astronomy, equivalent to the average radius of the Earth’s orbit, or about 150 million km.
atmosphere: Gaseous sphere surrounding the Earth, consisting essentially of oxygen and nitrogen. Gas pressure unit equal to the pressure exerted by a vertical column of mercury, 76 cm high and 1 cm 2 bases, at a temperature of 0 ° C at sea level. 1 atm. = 1.033 kg/cm 2.
barometer: an instrument for measuring atmospheric pressure, that is, the force per unit area exerted by the weight of the atmosphere.a to z physics dictionary
battery: device that transforms chemical energy into electrical energy. Also called an accumulator, it consists of two or more electrochemical cells connected in series, in parallel, or both.
binoculars: optical instruments consisting of two identical glasses, each equipped with a small concave lens, called an ocular, and a larger convex lens called an objective. Binoculars are identified by two numbers: for example 8-30. The first number represents the increases; the second is the diameter of the objective in millimeters. a to z physics dictionary
black hole: they are celestial objects with very large mass – some of them hundreds of times the mass of the Sun – that occupy a very small space. Its gravitational field is so intense that not even the speed of light is greater than its escape velocity.
body: Everything that has extension and shape. The portion of matter. a to z physics dictionary
boiling: Transformation of a liquid into a vapor operated on the liquid mass itself in the form of bubbles. Development of air bubbles in a liquid subject to heating.
bolometer: instrument used to measure small amounts of energy spread over the spectrum between light waves and microwaves. It is used to detect the energy radiated by distant sources, in the form of heat.
boson: in physics, an elementary particle whose spin is equal to zero or an integer number of units.
buoyancy: Vertical force, directed upwards, acting on an immersed body, passing through its center of gravity, equal to the weight of the displaced liquid volume.
capacitance: It is the electrical quantity of a capacitor, determined by the amount of electrical energy that can be stored in it by a certain voltage and by the amount of alternating current that passes through it at a certain frequency. Its unit is given in farad (symbol F).
capacitor: It is a component that stores energy in an electric field, accumulating an internal electrical charge imbalance.
cargo: Everything that is or can be transported by man, animal, car, ship, train, etc. Accumulation of electricity. Amount of electricity that an accumulator is capable of providing.
cartesian plane: Each of the imaginary vertical surfaces, which vary in-depth perspective, and on which the figures of a painting can be arranged. The foreground is that of the figures that seem closest to the observer.
cation: Positively charged ion.
centrifuge: Which has an opposite direction to that of the center. Out. a to z physics dictionary
centripetal: Which makes sense towards the center. Inside.
circle: Flat surface, bounded by a circumference.
circumference: Curved, flat, closed line, whose points are equidistant from an inner point called the center of the circumference.
compression: Action to reduce the smallest volume.
conductance: A measure of the ease with which a given conductor allows an electric current to circulate through it. Antonym of resistance. It is symbolized by G and measured in Siemens (S).
conductor: Which is used to conduct electricity. A body that transmits electricity, heat, and sound. Means of transmission, of communication. Lightning rod.
constant: That which is not subject to change in terms of state or action, or which occurs or always occurs again. The quantity that always retains the same value or acquires a fixed value in the course of a calculation; an independent number of variables, in an equation.
constant quantity: the quantity that does not vary under the conditions of the calculation.
convergent: Which is directed, and tends towards a common point. Competitor flows to the same place.
curve: Stroke, which can be a straight, curved or broken line, which graphically represents a variable element, as it is affected by one or more conditions.
cycle: A time interval during which a sequence of a regularly recurring sequence of events or phenomena is completed. Complete performance of a vibration, electrical oscillation, alternating current, or other periodic processes. Series of operations, at the end of which an active substance is returned to its initial state, commonly with accompanying heat conversion into mechanical work or vice versa. Period or revolution, always the same, of a certain duration, after which the astronomical phenomena must be repeated, in the same order.


degree: Each of the 360 ​​equal parts into which the circumference of the circle is divided. Each of the scale divisions of some instruments (thermometer, hygrometer, aerometer, etc.). Number of equal factors that go into the composition of a power. Some of the exponents of a given letter of a polynomial or the unknown of an equation, are in the term in which this sum is greater.
diagram: Graphical representation of certain facts, phenomena or scientific, social, economic or mechanical relationships, by means of geometric figures (points, lines, areas, etc.); graph, scheme.
diameter: Straight line that passes through the center of a circle, ending on both sides at the circumference or periphery, and thus dividing it into two equal parts. Transverse dimension. Spindle of the ball.
diffraction: Modification of light rays, when passing through the edges of an opaque body, or through a narrow slit, or when reflected from a glass or metal surface, provided with thin parallel lines, which results in their deflection and the formation of a series of light and dark bands, prismatic colors or spectra. Similar modification of other waves, such as sound or dielectric waves, that occurs when the full front of the wave is not directed to a focus or used, which results in the wave’s curvature around the object in its path.
dimension: Extension in any direction; size, measure, volume. Each of the three extensions (length, width and height) that are considered in Euclidean geometry.
displacement: Action or effect of moving. Removal, change of place.
divergent: That moves or extends in different directions from a common point; it departs progressively from one another from a common starting point. It does not combine; disagrees.
dynamic: Regarding dynamics, movement, strength.
echo: Repetition, more or less clear, of a sound reflected by a body. Repeated sound. Repetition.


electrical voltage: Electromotive force; voltage
electricity: A form of natural energy, linked to electrons, which is manifested by attractions and repulsions, and luminous, chemical and mechanical phenomena. It exists in a potential state (static electricity) as a charge (voltage), or in kinetic form (dynamic electricity) as a current.
electromagnetism: Study of the relationship between magnetism and electricity. Magnetism developed by an electric current.
electronics: Branch of Physics that deals with the emission, behavior and effects of electrons, especially in vacuum and gases.
ellipse: Section of a circular cone straight through an oblique plane in relation to the axis that meets all generators. The characteristic of the ellipse is that the sum of the distances from any of its points to the two foci is constant.
energy: The ability of bodies to produce work or develop strength.
entropy: The amount of energy in a system, which cannot be converted into mechanical work without communicating heat to some other body, or without changing the volume. Entropy increases in all irreversible processes and remains constant in reversible ones.
equation: Affirmation of the equality of two expressions linked by the equal sign (=), which only occurs for certain values ​​of the unknowns contained therein. The equations are called the 1 a , 2 a , 3 a , 4 a , etc. degrees, according to the exponent of the greatest power of the unknown.
evaporation: Transformation of a liquid into a vapor operated on the liquid mass itself in the form of bubbles. Development of air bubbles in a liquid subject to heating.
exosphere: Highest layer of the atmosphere, in which air particles circulate in elliptical orbits without frequent collisions. It represents approximately 1/3000 of the Earth’s atmosphere, in terms of mass, and is located from 1000 km in height.
expansion: expansion of dimensions or volume.


flow: Total number of power lines in the magnetic circuit that pass through a cross section taken perpendicular to the direction of the power lines.
frequency meter: It is an electronic instrument used to measure the frequency of a periodic signal.
friction: Resistance that a body develops when another body moves on it. Friction.
function: Quantity related to other (s), in such a way that each value assigned to these (s) corresponds to a value of that.
fusion: Passage of a body from the solid state to the liquid.


galileo: unit of acceleration equivalent to 10 -2 m / s 2 ; symbol: Gal.
generator: What generates, or produces. Which generates, by its movement, a line, a surface or a volume. Expression from which one derives or derives another. Apparatus in which vapor or gas is formed from a liquid or solid by the action of heat or by a chemical process. apparatus for converting mechanical to electrical energy in the form of direct or alternating current; dynamo.
grandeur: Anything that is liable to increase or decrease.
gravity: Effect, on the surface of a celestial body, of its gravitation and the centrifugal force produced by its rotation. Force of attraction of the land mass; attractive force that requests all the bodies to the center of the Earth.


 harmonic: That has harmony. As far as harmony is concerned. Consistent, consistent, well proportioned, regular, symmetrical. Designating accessory sounds, which are produced at the same time as a fundamental sound.
heating: Heating; heat,
height: Perpendicular distance from bottom to top; depth; thickness. 2 Distance between the lowest point and the highest point of something upright .
hertz: unit adopted by the international measurement system for frequency measurement. Its symbol is Hz .
heterogeneous: Which is different in nature from that of the other components of the complex or conglomeration of which it is a part; dissimilar. Composed of different constituent parts in terms of species, qualities or characteristics.
homogeneous: Which has the same nature, or is of the same gender as another object. Identical as a whole. It consists of parts or elements of the same nature.
horizontal: Parallel or relative to the horizon. That follows the direction of the waters at rest. Perpendicular to the vertical of the observation place. Line parallel to the horizon plane.
hyperbole: Double flat curve, which is the location of the points on a plane, whose difference in distances to two fixed points on that plane is constant.


impulse: Movement communicated to a body.
inductance: Property of an electrical circuit by which an electromotive force is induced by varying the current intensity: a) in the circuit itself; b) in a neighboring circuit.
induction: Act or effect of inducing. Formation or variation of electric or magnetic field, by the creation or variation of another neighboring electric or magnetic field.
inertia: Property that the bodies have of not changing by themselves their state of rest or movement. Lack of action, lack of activity.
interaction: reciprocal action of two or more bodies on each other. Updating the reciprocal influence of interrelated organisms.
interference: Meeting of two wave systems. Decrease in light that occurs when the light rays or two light beams are slightly inclined, forming a small angle. Effect produced in a receiver by waves or electric fields that produce noise or other signals at the reception.
ion: A particle with a positive or negative electrical charge, the size of an atom or molecule, which results from the loss or gain of one or more electrons by a neutral atom or molecule, or from the electrolytic dissociation of molecules in solutions due to temperature variation . The release of electrons requires the addition of energy, either by radiation or shock, or by high temperatures.
ionosphere: Layer of the upper atmosphere, 50 to 200 km from Earth, containing free electrically charged particles, through which radio waves are transmitted over great distances around the Earth.
isobaric: The one that has the same pressure during all stages of a process.
isochoric: What has the same volume during all stages of a process. a to z physics dictionary
isometric: The one that has the same dimensions during all stages of a process.
isotherm: Curve that describes an isothermal transformation, in a pressure by volume diagram.
isothermal: What has the same temperature during all stages of a process. a to z physics dictionary
joule: Practical unit of heat or work, equivalent to the energy produced in 1 second by a current of 1 ampere that passes through a resistance of 1 ohm; corresponds to 107 ergs or 0.102 kilogram.
kilogram: The kilogram is the mass equivalent to a pattern composed of iridium and platinum that has been located at the International Museum of Weights and Measures in the city of Sèvres, France since 1889. It is an equilateral cylinder 39 mm high by 39 mm in diameter .
kinetic (o): Relative or pertaining to the movement.
length: Extension of any object from side to side in the direction in which the distance is greatest. Extension measured from one point to another; distance.
light year: Astronomical length unit: distance covered by light in one year. It corresponds approximately to 9,463 x 10 12 km.
liquid: It flows or flows, always tending to level and take the shape of the vessel that contains it. Syrupous, viscous.
lithosphere: The solid part of the Earth; Earth’s crust.
lumen: Unit of luminous flux, which is the light emitted by a uniform focus, infinitely small and with the intensity of a decimal candle, radiated within a solid angle that intercepts an area of ​​1 m 2 over the sphere of 1 m radius , which focuses on the focus.
magnet: Magnetized steel piece that has the property of attracting iron and some other metals; magnet. Quality of what attracts. The thing that attracts.
magnet: an Electric generator that provides the necessary voltage for the spark to jump on the motor.
magnetic pole: Each of the two points of a magnet or magnetized body in which the density of the magnetic flux is more or less concentrated. Each of the two terminals of a battery or a dynamo is related in such a way that, if the two are connected by an external conductor, an electric current will flow from the pole that has greater potential for the other.
magnetism: Property that some metallic bodies have to attract and retain other metals and orient the magnetic needle in a north-south direction. Part of Physics deals with these phenomena. Group of phenomena resulting from the magnetic property of the magnet.
mass: Amount of matter that forms a body.
mechanics: Science that deals with the laws of movement and balance, as well as their application to the construction and use of machines.
meter: Unit of length, adopted as the basis of the decimal metric system in 1791, calculated as the tenth millionth of a quarter of the terrestrial meridian. This measure is represented by the iridium platinum bar found in the Breteuil pavilion, in Sèvres (France), when this, under normal pressure, is subjected to a temperature of 0 ° C. Currently, a more accurate process of representing it has been found, based on the wavelength of the orange-red spectral line of light emitted by krypton atoms 86. It is represented by m.
neutron: one of the fundamental particles that make up matter. Its mass is 1.675 x 10-27 kg, approximately 0.125% greater than that of the proton. It has no electrical charge. It is a constituent particle of all nuclei, except that of common hydrogen.
newton: Unit of force in the international system (SI), equal to 105 dynes.
normal straight: Perpendicular straight. It is said of the line perpendicular to the tangent of a curve.
nucleus: central mass of an atom, positively charged, around which are the orbital electrons. It consists of protons and neutrons and contains almost the entire mass of the atom.
nucleus: the sum of the number of protons and neutrons contained in the nucleus of an atom. The atoms of the same element can have different mass numbers, depending on the isotope.
Ohm: unit designated by the international measurement system (SI) for measuring electrical resistance, symbolized by Ω.
oscillation: Act or effect of oscillating. Periodic movement in which the mobile describes the trajectory now in one, now in another sense, as is the case with the pendulum removed from its position of stable and abandoned equilibrium. Shuttle movement. The succession of charges and discharges is motivated by the electromagnetic energy stored in a circuit.
oscillator: That oscillates. The device is formed by an electronic valve and a coil, used to produce alternating current.
oscilloscope: An instrument that makes electrical oscillations visible, widely used by video operators to adjust the images to be transmitted.
overlap: Act or effect of overlapping; overlay. Juxtaposition.
ozone: Slightly bluish gas, with an alliaceous smell, whose molecule consists of three oxygen atoms, and which develops under the influence of electrical discharges.
parabola: Flat curve whose points are equidistant from a fixed point (focus) and a fixed line (guideline) or curve resulting from a section made in a cone by a plane parallel to the generatrix. Curve that a projectile describes.
parallel: Designates lines or surfaces that always maintain the same distance from each other over their entire length.
parsec: Unit of measurement for interstellar space, equal to a distance that has a heliocentric parallax of 1 second or 206,265 times the radius of Earth’s orbit, or 3.26 light years, or 30.8 trillion kilometers.
particle: It is a body with mass, with a negligible size, which can be considered as a point.
pendulum: Heavy body, suspended from a fixed point that oscillates freely in a reciprocating motion. Something that has been done or happens at regular intervals.
performance: Useful effect of any machine.
period: Time elapsed between two events or two dates. The time that a star takes to describe its orbit. Any determined or indeterminate amount of time.
perpendicular: It is said of the line that forms equal adjacent angles with another or with those that, belonging to the same plane, passes through the point where it intersects that plane.
phase: Each aspect of the Moon and some planets while describing its orbit. Oscillation state at a given time. A homogeneous, physically distinct, and mechanically separable portion of matter is present in a heterogeneous system, which can be either a single compound or a mixture. The position of an alternating force in a cycle, measured from the preceding zero value.
plane: It is said of a surface such that the entire line that joins any two of its points is entirely comprised on that surface.
point: Geometric element considered without dimensions, only with the position.
potential: It is said that energy-dependent is on the position or nature of the body. The amount of positive electrical charge of a body in relation to that of the earth or of a conductor connected to the earth is considered zero. Work capacity in relation to the factors that facilitate or hinder the action.
potentiometer: A device with which the differences in electrical potential are measured. Partly designed to control the voltage in the electronic circuits.
power: Work done in the time unit.
pressure: The application of a force to a body by another body in contact with it. Action that a body exerts on the surface on which it lands. Action by one force against another opposes it. Force exerted by a fluid in all directions, is always measured per unit area.
principle: Law, doctrine, or fundamental meaning on which others are based or from which others are derived. Rule of law is exemplified in natural phenomena, in the construction or operation of a machine or mechanism, and in the effectiveness of a system.
propagation: Transmission of a form of vibratory energy (light, sound, radio wave), through space or along a path.
propulsion: It is the movement created from a force that gives impulse. Propulsion can be created in any act of pushing forward or giving impulse.
quantum: a smaller amount of energy that can be transmitted at any wavelength.
radian: Angle unit; the central angle that intersects an arc of the circumference which, when ground, is equal to the length of the radius.
radiation: Transmission of energy through space in a straight line, at a speed of up to 300,000 km / s (light, heat, radio, or free bodies, whenever obstacles are not opposed). The beam of material particles (gas, liquid or solid), in motion. Luminous flux emitted per surface unit.
radio: White metallic element, shiny, alkaline earth, intensely radioactive, chemically similar to barium; Symbol Ra, atomic number 88, atomic mass 226.05. Telegraphy transmitter or receiver or cordless telephone. Radiophonic apparatus, which receives radio waves, through which sounds are transmitted over greater distances.
radioactive: Relative to or belonging to, or that has radioactivity. Caused by radioactivity.
rarefaction: Decrease in weight and density of a body, keeping the same volume. a to z physics dictionary
ray: Line or trace of light, that the stars and other luminous bodies emit. Set of rectilinear movements by means of which the vibrations of bodies are propagated, resulting in the production of light, heat, etc. The line that, starting from the center of the circle, will end at the circumference; half a circumference diameter. The shortest distance from the center to each point on the surface of a sphere or spheroid. The distance from the center to the vertices of a regular polygon. The distance from the center to each point is on a tight curve. The distance that goes from a central point or that is taken as a center, to the periphery, in a given area. a to z physics dictionary
reaction: Act or effect of reacting. Action that resists or opposes the other; resistance. Reflex action or resistance that a body opposes by its inertia to another that acts on it, or to a force that requests it. The process by which, from the reciprocal action between two or more substances, another or other forms of different characteristics are formed. Action or movement in the opposite direction to a previous movement or action caused by that action or movement.
reactive: That makes it react or causes a reaction.
reactor: It reacts. Reactionary. Reaction propulsion engine in which the thermal energy of combustion is transformed into kinetic energy by expansion.
referential: Which is used as a reference. Rigid system in relation to which the spatial and temporal coordinates of physical events can be specified; reference system.
reflection: Back or backward that makes the body elastic, jumping from the body that was hit. Deviation of direction that a body suffers, when, animated by a certain speed, it encounters another resistant body; ricochet. Return of light or sound. The phenomenon occurs when a ray of light or heat falls on a flat and polished surface, returning to the environment from which it started.
reflection: What is done through reflection; reflected. Indirect. Imitated, reproduced. The effect produced by reflected light; streetlight. a to z physics dictionary
refraction: Deviation that the rays of light, heat, or sound undergo when passing from one medium to another. Change of direction of circulation of electric or electromagnetic energy, when it passes from one to another means of different conductivity. Deviation that a body undergoes in a movement when passing through a resistant medium.
relative: This is calculated with reference to a proportion, to a comparative value; proportionate.
resistance: Cause that contradicts the action of a force. Cause that opposes the movement of a body. The property of electrical conductors in opposing the passage of electric current consumes part of its electromotive force, which is transformed into heat. The force that opposes movement; is inertia.
resistor: Part that increases the electrical resistance of a circuit.
resonance: Effect that, in the frequency of a mechanical or electrical system, produces the intervention of external forces.
retrograde: Who walks backward, who opposes progress.
reverberation: Extension of a sound due to the effect of reflection on the walls of an enclosure.
rigid: Not very flexible; tough. Straight, stiff.
rolling: Rolling action or effect.
rotation: Circular movement of a body that rotates around an axis or on itself. The movement performed by a star around its own axis. Revolution of a surface around a line that gives rise to the formation of a solid. a to z physics dictionary
roughness: Roughness . a to z physics dictionary
scalar quantity: quantity represented by a numerical value.
scale: Series of spaces separated by dashes or points, used to measure distances or quantities. Graduation of certain instruments, such as the thermometer and the barometer, through which their indications are read. A line or strip is divided into equal parts, which indicates such proportion, and is placed at the bottom of a map or plan. a to z physics dictionary
second: it is a unit of angular measurement used also to measure time intervals. The second is the duration of 9,192,631,770 periods of the radiation corresponding to the transition between two hyperfine levels of the fundamental state of the cesium atom 133. a to z physics dictionary
sinusoid: Sine curve, where the abscissa is proportional to the arc or angle and the ordinates to its sine.
slope: Deviation from the perpendicular direction.
solid: Which has its own shape. That has the consistency to resist weight, time, shock, and any external forces. What has solidity; which has a lot of consistency; which is durable. A body that has three dimensions (length, width, and height). Hypothetical body in whose parts an indefinite adherence is assumed and therefore not susceptible to extension, compression, or flexion.
solidification: Act or effect of solidifying. Passage of a body from the liquid state to the solid state.
space: Unlimited or infinitely large three-dimensional extension, which contains all beings and things and is the field of all events. The entire universe beyond the Earth’s atmospheric envelope; is the almost vacuum in which the solar system, stars, nebulae, and galaxies exist. A portion of this extension at a given moment (such as the space occupied by a body; the space within a hollow sphere; a space of ten cubic meters); volume. Limited extension in three dimensions
speedometer: device that measures instantaneous speed.
static (o): Relative or pertaining to static. Relative or belonging to bodies at rest or to forces in balance, as opposed to dynamic. At rest; immobile. In balance; stable. Non-dynamic.
straight: Line that establishes the shortest distance between two points; straight line.
stratosphere: Layer of the atmosphere, the lower limit of which ranges from 5 to 20 km and the upper limit is undefined, but generally considered to be about 100 km above the Earth’s surface. a to z physics dictionary
strength: Any cause capable of producing or accelerating movements, offering resistance to displacements, or determining deformations of the bodies.
sublimation: Passage of a body directly from the solid to the gaseous state and vice versa.
surface: Extension expressed in two dimensions: length and width. The outside or face of the bodies. What circumscribes bodies; the limits of a body; the length and width considered without depth.
system: A set or combination of things or parts in order to form a complex or unitary whole. Any set or series of correlated members or elements.
tangent: That touches or touches. The line or surface is said to touch another line or surface at a single point.
tesla: Magnetic induction measurement unit in the International System. a to z physics dictionary
theorem: Any proposition that, in order to be admitted or to become evident, needs to be demonstrated.
thermodynamics: Study of the mutual relations between calorific and mechanical phenomena.
thermology: Treatise on heat. Part of Physics related to heat.
thermometry: Temperature measurement.
torque: That which produces or tends to produce rotation or torsion and whose effectiveness is measured by the product of the force and the perpendicular distance from the line of action of the force to the axis of rotation. 2 Moment of a system of forces that tend to cause rotation.
trajectory: Line or path taken by a point in a moving body. Geometric location of the positions occupied by a piece of furniture. Path, road, middle, path, road. Curve described by the projectile during its path in the air. Orbit.
transistor: Crystal amplifier, invented in the USA in 1948, to replace the electronic valve in receivers.
trapezoid: Quadrilateral that has two unequal and parallel sides. a to z physics dictionary
tube: Generally cylindrical, hollow, elongated body of the most varied materials, such as glass, rubber, plastic, etc., through which liquids, air, or gas can pass.
tuning fork: A small steel instrument that gives a constant note and serves to measure the voices and musical instruments. Note fixed by the instrument described above.
ultrasound: a branch of physics that deals with high-frequency sound waves. Frequencies of several gigahertz can be produced, converting alternating electrical currents into mechanical oscillations. a to z physics dictionary
ultraviolet: electromagnetic radiation whose wavelengths range from 400 nm to 15 nm. It can be produced artificially in arc lamps; that of natural origin comes from the Sun.
uniform: Which has only one shape; that has the same shape; equal, identical; very similar; according. Monotonous, invariable; constant, regular.
vacuum: That he is not occupied by anything; that contains nothing; empty, dumped. Space in which there is no atmospheric pressure. Absolute or almost absolute emptying, or external rarefaction of air or gas. The empty space that is supposed to exist between the celestial bodies.
vaporization: Change from liquid to gaseous state.
variable quantity: a quantity that varies under the conditions of the calculation. a to z physics dictionary
vector: Quantity that for its complete specification requires a quantity, direction, and sense; it is commonly represented by a line segment whose length designates the magnitude of the vector and whose direction is indicated by an arrowhead at one end of the segment. a to z physics dictionary
vector quantity: quantity represented by a vector.
vertical: direction perpendicular to the plane of the horizon; which follows the direction of the plumb line.
volt: Unit of electrical potential or electrical voltage and electromotive force; the difference in electric potential between the ends of a conductor of resistance equal to 1 ohm international, traveled by a current of invariable intensity, equal to 1 international ampere. a to z physics dictionary
voltmeter: High resistance instrument, used to measure, in volts, the potential difference between two points.
Wave: part of physics that studies all types of waves and their propagation. a to z physics dictionary
Wave: Disturbance that spreads in a continuous environment. Concentric lines or surfaces are produced in a fluid mass when one of its points received an impulse.
weight: Measure of the force with which the bodies are attracted to the central point of the Earth. The pressure exerted by a body on the obstacle that directly opposes its fall. Gravity is inherent in the body. a to z physics dictionary
work: Product of the multiplication of a force by the distance traveled by the application point, in the direction of the force. The action of a force that sets in motion a body that opposes resistance to it. Efforts are used to overcome resistance.

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