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Wave Optics question

2022 · Q165
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Wave Optics question

2022 · Q165

NEETPhysicsWave OpticsMCQ+4 / −1

After passing through a polariser a linearly polarised light of intensity I is incident on an analyser making an angle of 30∘^\circ∘ with that of the polariser. The intensity of light emitted from the analyser will be

  1. A
    2I3{{2I} \over 3}32I​
  2. B
    I2{I \over 2}2I​
  3. C
    I3{I \over 3}3I​
  4. D
    3I4{{3I} \over 4}43I​
View written solutionFree

Correct answer: D

According to Malu's Law

$${I_{out}} = {I_{in}}\,{\cos ^2}\theta $$

$${I_{out}} = I\,{\cos ^2}(30^\circ )$$

$${I_{out}} = {{3I} \over 4}$$

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