1.

An unpolarized beam of intensity I0 is passed through a polariser. The intensity of emergent beam is

Answer»

Correct option is (B) \(\frac{I_0}2\)

When unpolarized beam of intensity is passed through a polariser, the intensity of emerge beam will half.

I = I0Cos2\(\theta\)

Average value of Cos2\(\theta\) = 1/2

So, I = I0 \(\frac12\)

I = \(\frac{I_0}2\)



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