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Wave Optics question

2024 · Q192
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Wave Optics question

2024 · Q192

NEETPhysicsWave OpticsMCQ+4 / −1

A beam of unpolarized light of intensity I0 is passed through a polaroid A, then through another polaroid B, oriented at 60∘60^\circ60∘ and finally through another polaroid C, oriented at 45∘^\circ∘ relative to B as shown. The intensity of emergent light is:

NEET 2024 (Re-Examination) Physics - Wave Optics Question 3 English

  1. A
    I016\frac{I_0}{16}16I0​​
  2. B
    I04\frac{I_0}{4}4I0​​
  3. C
    I02\frac{I_0}{2}2I0​​
  4. D
    I032\frac{I_0}{32}32I0​​
View written solutionFree

Correct answer: A

$$\begin{aligned} & I_1=\frac{I_0}{2} \\ & I_B=\left(I_1\right) \cos ^2 60^{\circ} \\ & =\frac{I_0}{2}\left(\frac{1}{2}\right)^2=\frac{I_0}{8} \\ & I_C=I_B \cos ^2 45^{\circ} \\ & =\frac{I_0}{8} \times\left(\frac{1}{\sqrt{2}}\right)^2=\frac{I_0}{16} \end{aligned}$$

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