Question

The critical angle is maximum when light travels from ______.

`(a^mu"w"=4/3,a^mug=3/2)`

Options

• air to water

• glass to water

• glass to air

• water to air

Answer 1

The critical angle is maximum when light travels from glass to water.

Explanation:

`sin  c=1/mu`

`a^mu"w"=4/3,a^mug=3/2,"w"^mug=(a^mug)/(a^mu"w")=9/8`

Critical angle will be maximum when refractive index of the denser medium w.r.t. the rarer medium is minimum.

`"w"^mug=9/8` is minimum