This Physics dictionary compendium offers you dictionaries and glossaries with detailed explanations and definitions of terms, phrases, acronyms and abbreviations related to Physics. Capillary action: rise of liquid in narrow tube due to surface and after an interaction. Index of refraction: ratio of the speed of light in vacuum to Rest energy: energy due to mass of object; E= mc^ 2. of projectile and where it returns to launch height. electrons. Normal force: force perpendicular to surface. n , where 1< M < 10, and n is an integer. waves throughout space. of air resistance equals weight. and magnetic fields that move at speed of light through space. and mesons. source and detector. Convex lens: lens that is thicker in the center than at edges. Convection: heat transfer by means of motion of fluid. Heat of fusion: quantity of energy needed to change a unit mass into electrical energy. the medium. Newtons law of motion: laws relating force and acceleration. Ammeter: device to measure electrical current. the number of protons or neutrons in a nucleus changes. Myopia: defect of eye, commonly called nearsightedness, in which Acceleration: change in velocity divided by time interval over Weight: force of gravity of an object. causing it. Physics Dictionary. Joule: SI unit of energy equal to one Newton-meter. Archimedes principle: object immersed in a fluid has an upward Linear restoring force: force in direction toward equilibrium Primary pigment: yellow, green, or magenta light. Fundamental particles: those particles( i.e. Meter: SI unit of length. of atoms. Electrical current: flow of charged particles. n-type semiconductor: semiconductor in which current is carried distant objects focus in front of the retina. temperature o region of lower temperature. electrical energy. magnetic flux produced in one coil and that which passes through a second Monochromatic light: light of a single wavelength. and vice versa. electrical charges. Huygens wavelets: model of spreading of waves in which each Lens equation: See mirror equation. Magnification: ratio of size of an optical image to the size numbers of neutrons. Charge caused by flow Position: separation between object and a reference point. Amplitude: in any periodic motion, the maximum displacement from in decibels. between two variables. a sound source at other end. Ohms law: resistance of object is constant, independent of voltage exposed to electromagnetic radiation. Torque: product of force and the lever arm. The force is proportional to objects speed. Illuminated object: object on which light falls. quantized: a quantity that cannot be divided into smaller increments Elementary charge: magnitude of the charge of an electron. Kinematics: study of motion of objects without regard to the and a line perpendicular to surface the waves are reflected from. Energy: non-material property capable of causing changes in matter. Average acceleration: acceleration measured over a finite time Nuclear transmutation: change of one nucleus into another as has a period independent of amplitude of motion. force acts. Thermal equilibrium: state between two or more bodies where temperatures Open- pipe resonator: cylindrical tube with both ends closed Diverging lens: lens that causes light rays to spread apart or tangent: the ratio of the opposite side and the adjacent side. Electromagnetic force: one of fundamental forces due to electric Alpha particle: positively- charged particles consisting of two gamma rays. Hyperbola: mathematical curve that describes an inverse relationship Derived units: unit of quantity that consists of combination of fundamental or reflects others. mass. Fraunhofer lines: absorption lines in the suns spectrum due Potential difference: difference in electric potential between Galvanometer: device used to measure very small currents.

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