IB Physics Glossary
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is the distance to a star whose parallax angle is 1 arc-second. (d)
is color vision which occurs at normal light levels. Vision is aided by the three different cone cells, S (for short-wavelengths or blue), M (for medium-wavelengths or green) and L (for long-wavelengths or red).
of light occurs when the direction of the electric field oscillations is in the same plane. (d)
Potential divider rule
is a stored form of energy available to do work.
is the rate at which work is done. (d)
tells us how consistent repeated measurements are. A precise set of measurements are relatively closer together. An imprecise set of measurements are spread apart.
is the force per unit area. (d)
are red, green and blue. Mixed together they produce white.
Principle of Superpostion
when the paths of two waves of the same type coincide, move through each other or cross, the resultant displacement is the sum of the two individual wave displacements at the point. (s)
Progressive travelling wave
transfers energy with no net motion of the medium through which the wave travels. (d)
is a rotating neutron star. (d)