What should be the angle between the axes of the polarizer, so that the intensity of the beam coming out of analyzer is 3/8 I

  1. 45 degree

  2. 30 degree

  3. 60 degree

  4. cos-1(3/8) rad

Answers (1)

When unpolarized light is passed through the polarizer the intensity becomes half, Hence after passing through polarizer equals \frac{I}{2}

Now after coming out of the analyzer, the intensity becomes \frac{3I}{8}

Use Malus Law, \frac{3I}{8} = \frac{I}{2}\cos ^{2}\Theta

\cos ^{2}\Theta = \frac{3}{4}

\Theta = 30^{0}

Option (2) is correct.

 

 

Preparation Products

Knockout BITSAT 2021

It is an exhaustive preparation module made exclusively for cracking BITSAT..

₹ 4999/- ₹ 2999/-
Buy Now
Knockout BITSAT-JEE Main 2021

An exhaustive E-learning program for the complete preparation of JEE Main and Bitsat.

₹ 27999/- ₹ 16999/-
Buy Now
Boost your Preparation for JEE Main 2021 with Personlized Coaching
 
Exams
Articles
Questions