lamdaa and lamdam are the wavelengths o...

`lamda_a` and `lamda_m` are the wavelengths of light in air and medium respectively. If `i_p` is the polarising angle, the correct relation between `lamda_(a), lamda_m ` and `i_p` is

`lamda_a = lamda_m tan^2 i_p`

`lamda_m = lamda_a tan^2 i_p`

`lamda_m = lamda_a tan i_p`

`lamda_a = lamda_m tan i_p`

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