Question

If light travels at a speed of 3×10^8ms^1 in a vaccum, what will be the speed of light if it is made to travel in a medium of refractive index 1.85

Answer 1

Explanation:

speed of light is(c) = 3×10^8ms^-1

refractive index =1.85

we know that,

r=c/v

1.5=3×10^8/v

v= 3×10^8/1.5

v=2×10^8ms^-1