Question

The refractive index of glass and water with respect to air are 3/2 and 4/3 respectively. If speed of light in glass is 2×10^8 m/s, find the speed of light in water


Please answer please ​

Answer 1

Explanation:

Give: n water =4 upon 3 n glass 3 upon 2 v glass 2×10⁸ m/s n air =1 speed if light in a medium =c

upon n

where c and n are the speed of light in vaccum and refractive index medium

a: v glass= c upon n glass

2×10⁸=c(3/2) = c= 3×10⁸ m/a

b: c upon n water

v water 3×10⁸ upon(4/3) 2.26 × 10⁸ m/s