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Index of Refraction

المؤلف:  GEORGE A. HOADLEY

المصدر:  ESSENTIALS OF PHYSICS

الجزء والصفحة:  p-458

2025-12-25

708

Index of Refraction- If Fig. 1represents light passing from air into water, FG is the distance the light travels in water while it travels the distance LB in air. Hence  LB : FG = V: ,where V and are the velocities in air and water respectively.

Since V and v are constant velocities the ratio V/v  must also be a constant and this is called the index of refraction.

The index of refraction is a constant for all angles of incidence and is the same as the ratio of the velocities of light in the two media.