Question

the velocity of light in air is 3 into 10 power 8 metre per second and the velocity of light in a medium is 2 into 10 power 8 metre per second the critical angle for the pair is?​

Answer 1

Answer:

2:3 is the ratio for there critical angles

Explanation:

medium/ air, so given critical Angle of medium =2x10^8

air=3x10^8

then the ratio is taken with respect to medium so,it is 2x 10^8/3x10^8

it comes as 2/3.i.e,2:3

hope it helps you a little