A light is travelling from air a medium the velocity of light in a medium is reduced to to 0.75 times the velocity n air assume that angle of incidence I is very small the deviation of the ray is

Options

A. i
B. `(i)/(3)`
C. `(i)/(4)`
D. `(3i)/(4)`

Answer

D

Explanation

`n = (c )/(0.75c)`
`rArr n = (4)/(3) " " [ because n = (sin i)/(sin r) ] `
Given sin i = i
`therefore " " sin r = (i)/(n) = (3i)/(4)` .