Question

Q25
SECTION-D
what is meant by lateral displacement? Illustrate it with the help of diagram.
what is meant by relative refractive index? The relative refractive indices of water and glass with
respect to air are 4/3 and 2/3 respectively. If the speed of light in glass is 2 x 10° m/s. Find the speed of
light in water.

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Answer 1

Explanation:

"Lateral displacement.The perpendicular distance between the incident ray and the emergent ray is defined as lateral shift.This shift depends upon the angle of incidence,the angle of refraction and the thickness of the medium.

Here, is the relative refractive index of medium b with respect to medium a.Consider a ray of light travelling from medium B into medium A. Let v1 be the speed of light in medium A and v2 be the speed of light in medium B. Then the refractive index of medium A with respect to medium B is given by

If one medium is vacuum or air then the constant is named as absolute refractive index of the medium.