A beam of light of intensity I1 is incid...

A beam of light of intensity `I_1` is incident on a tourmaline crystal and then on another tourmaline crystal. The transmission axes of both crystals are parallel to each other. If the intensity of light transmitted through the second crystal be `I_2`, then :

A

`I_1 = I_2`

B

`I_1 = 2I_2`

C

`I_1 = 4I_2`

D

`2I_1 = I_2`.

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