Question

Refractive index of a medium A with respect to air is 5/3 .what is the refractive index of air with respect to the medium A?

Answer 1

we know that critical angle and RI are related as follows

= 1/sinc = RI

= sinc =1/RI

thus as RI =1.5

sinc = 1/1.5

sinc =.6666

c= sin inverse of .6666

Answer 2

The refractive index of air with respect to glass is 2/3 and refractive index of water with respect to air is 4/3. If the speed of light in glass is 2x10 to power 8 .