Physics-(general)
NEET Physics (general) MCQ Question
Type: MCQ-diagram based-Medium-Class 12
In the diagram shown above of a wave passing through two polaroids, how does the intensity of light change when the angle between the polaroids' pass-axes is 45°?
A
Intensity is 25% of the incident light.
B
Intensity is 50% of the incident light.
C
Intensity is 75% of the incident light.
D
Intensity is 100% of the incident light.
Correct Answer
Option A
Detailed Explanation
According to Malus' law, the intensity of light after passing through two polaroids is given by I = I₀ cos²θ. At 45°, the intensity is I = I₀ cos²(45°) = I₀ (1/2) = 0.25 I₀, or 25% of the incident light.
Found an issue with this question?