Initially polarized light is incident on a polarizer. If the intensity of the light after passing through the polarizer is (3/4) of the initial intensity, the angle between the polarizer axis and the original polarization axis of the light is
A) 41.4°.
B) 30°.
C) 48.6°.
D) 60°.

Question

Quizplus · Accepted Answer

The intensity of polarized light after passing through a polarizer is given by Malus's law, I = I0 cos^2(θ), where I0 is the initial intensity, I is the final intensity, and θ is the angle between the light's initial polarization direction and the polarizer's axis. Given that I/I0 = 3/4, we have cos^2(θ) = 3/4, leading to θ = 30°.

Initially Polarized Light Is Incident on a Polarizer