Question

Critical angle for a medium with respect to air is 45 degree the refractive index of that medium with respect to air is

Answer 1

Hello!
This is a case of Total Internal Reflection, here the relation between critical angle (θc) and refractive index (n) is given as

 θc = sin-1(1/n)

here θc = 45o, so n is

   n = 1/sinθc = √2

$so \: \sqrt{2 \: } is \: your \: answer$


 

@All, thanks for the answer. keep it up!

Answer 2

Answer:

n=1/sin ic

n=1/sin 45°

n=1/1/root 2

n=root 2