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Online Physics Glossary
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Word Meaning Remarks
Angle of incidence Angle between direction of motion of waves and a line perpendicular to surface the waves are striking.
Angle of reflection Angle between direction of motion of waves and a line perpendicular to surface the waves are reflected from.
Angle of refraction Angle between direction of motion of waves and a line perpendicular to surface the waves have been refracted from.
Angular momentum Quantity of rotational motion. For a rotating object, product of moment of inertia and angular velocity.
Annihilation Process in which a particle and its antiparticle are converted into energy.
Antenna Device used to receive or transmit electromagnetic waves.
Antineutrino Subatomic particle with no charge or mass emitted in beta decay.
Antinode Point of maximum displacement of two superimposed waves.
Archimedesí principle Object immersed in a fluid has an upward force equal to the weight of the fluid displaced by the object.
Artificial radioactivity Radioactive isotope not found in nature.
Atomic number Number of protons in the nucleus of the atom.
Average acceleration Acceleration measured over a finite time interval
Average velocity Velocity measured over a finite time interval.
 
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