The critical angle for refraction from glass to air is 30^@ and that from water to air is 37^@ Find the critical angle for refraction from glass to water.

The critical angle for refraction from glass to air is 30^@ and that f

1.	The critical angle for refraction from glass to air is 30^@ and that from water to air is 37^@ Find the critical angle for refraction from glass to water.
Answer» `sin^-1(5//6)` `51^@ 3.` `61^@2` `63^@ 3.` Answer :A