Q .     `{ \lambda }_{ a }` and ` { \lambda }_{ m }` are the wavelengths of a beam of light in air and medium respectively. If `\theta` is the polarizing angle, the correct relation between `{ \lambda }_{ a },{ \lambda }_{ m }` and ` \theta` is:

UPSEE 2015
A

` { \lambda }_{ a }={ \lambda }_{ m }{ tan }^{ 2 }\theta`

B

` { \lambda }_{ m }={ \lambda }_{ a }{ tan }^{ 2 }\theta`

C

`{ \lambda }_{ a }={ \lambda }_{ m }\cot { \theta }`

D

`{ \lambda }_{ m }={ \lambda }_{ a }\cot { \theta }`

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