Question

does refractive index of glass and water are 4.3 and 3.2 respectively if the speed of light in the glass is 2 into 10 power 8 metre per second then determine the speed of light in vacuum and water​

Answer 1

Answer:

refractive index of a medium is defined as the ratio od speed to light in medium.

given vg= 2×10raise to 8 m/s

let velocity in vaccum be v

refractive index of glass is 3/2 ng=v/vg

3/2=v/2×*10)8

v= 3×2×10)8/2= 3×10(8 m/s0

so speed og light in vaccum is

3×10)8

Vw= 3×3×10)8/4= 2.25×10^8m/s