AP EAMCET · PHYSICS · Wave Optics
An unpolarised beam of light incidents on a group of three polarising sheets arranged such that the angle between the axes of any two adjascent sheets is \(30^{\circ}\). The ratio of the intensities of polarised light emerging from the second and third sheets is
- A \(1: 1\)
- B \(2: 1\)
- C \(4: 3\)
- D \(3: 2\)
Answer & Solution
Correct Answer
(C) \(4: 3\)
Step-by-step Solution
Detailed explanation
\(I_3 = I_2 \cos^2(30^{\circ})\) \(\frac{I_2}{I_3} = \frac{1}{\cos^2(30^{\circ})}\) \(\frac{I_2}{I_3} = \frac{1}{(\frac{\sqrt{3}}{2})^2}\) \(\frac{I_2}{I_3} = \frac{1}{\frac{3}{4}} = \frac{4}{3}\) \(4:3\)
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