A beam of unpolarised light of intensity\[{{I}_{0}}\]is passed through a polaroid A and then through another polaroid B which is oriented so that its principal plane makes an angle of\[45{}^\circ \] relative to that of A. |
The intensity of the emergent light is: [JEE MAIN 2013] |
A) \[{{I}_{0}}\]
B) \[{{I}_{0}}/2\]
C) \[{{I}_{0}}/4\]
D) \[{{I}_{0}}/8\]
Correct Answer: C
Solution :
[c] Intensity of light is halved upon passage through first polaroid. |
Using Malus Law: |
(The angle between the polarization axes of the polaroids) |
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