OnlineCBT
Physics · PYQ NEET UG 2025
हिन्दीThe intensity of transmitted light when a polaroid sheet, placed between two crossed polaroids at \( 22.5^\circ \) from the polarization axis of one of the polaroid, is (\( I_0 \) is the intensity of polarised light after passing through the first polaroid):
Correct answer · Option 3
\( \frac{I_0}{8} \)
Explanation
Using Malus's Law successively, \( I = I_0 \cos^2(22.5^\circ) \sin^2(22.5^\circ) = I_0 (\frac{\sin(45^\circ)}{2})^2 = \frac{I_0}{8} \).
