COMEDK · Physics · 26. Wave Optics
Two polaroid \(A\) and \(B\) are kept with their transmission axes at an angle \(\theta\) with respect to one another. If the transmitted intensity of light \(I_{t}=0.75 I_{0}\), where \(I_{0}\) is the intensity of light incident on the system, then \(\theta\) is
- A \(30^{\circ}\)
- B \(45^{\circ}\)
- C \(60^{\circ}\)
- D \(90^{\circ}\)
Answer & Solution
Correct Answer
(A) \(30^{\circ}\)
Step-by-step Solution
Detailed explanation
For two polaroids placed at an axis making angle \(\theta\) with each other, then according to law of malus, the intensity of transmitted light is Here, \[ \begin{aligned} &I_{t}=I_{0} \cos ^{2} \theta \\ &I_{t}=0.75 I_{0} \end{aligned} \]…
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