The velocities of light in two different media are 2 times 10^8 m//s and 2.5 times 10^8 m//s respectively, the critical angle for these media is

The velocities of light in two different media are 2 times 10^8 m//s a

1.	The velocities of light in two different media are 2 times 10^8 m//s and 2.5 times 10^8 m//s respectively, the critical angle for these media is
Answer» `sin^-1 (1/5)` `sin^-1(4/5)` `sin^-1(1/5)` `sin^-1 (1/4)` ANSWER :B