(C) Initially,the polarizer and analyzer axes are parallel,so the intensity emerging from the analyzer is $I = I_{max} = 100 \text{ Lumens}$.According

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

(C) Initially,the polarizer and analyzer axes are parallel,so the intensity emerging from the analyzer is $I = I_{max} = 100 \text{ Lumens}$.According to Malus' Law,the intensity of light emerging from the analyzer after it is rotated by an angle $\theta$ is given by $I = I_{max} \cos^2 \theta$.Here,$I_{max} = 100 \text{ Lumens}$ and $\theta = 30^{\circ}$.Substituting these values,we get:$I = 100 \times \cos^2(30^{\circ})$$I = 100 \times (\frac{\sqrt{3}}{2})^2$$I = 100 \times \frac{3}{4}$$I = 75 \text{ Lumens}$.

Class 12 Physics Wave Optics Polarisation of Light and Malus' Law

Difficult

An unpolarized light beam is incident on the polarizer of a polarization experiment and the intensity of the light beam emerging from the analyzer is measured as $100 \text{ Lumens}$. Now,if the analyzer is rotated around the horizontal axis (direction of light) by $30^{\circ}$ in the clockwise direction,the intensity of the emerging light will be .......... $\text{ Lumens}$.

JEE MAIN 2021 All JEE MAIN

A
$150$
B
$50$
C
$75$
D
$100$

Explore More

Browse All

Question Bank

All Subjects

Class 12 Questions

Class 12

Physics Questions

Chapter

Wave Optics

Subtopic

Polarisation of Light and Malus' Law

Previous Year

JEE MAIN 2021 Paper All JEE MAIN years →

An unpolarised light of intensity $I$ is passed through two polaroids kept one after the other with their planes parallel to each other. The intensity of light emerging from the second polaroid is $\frac{I}{4}$. The angle between the pass axes of the polaroids is (in $^{\circ}$)

EasyKCET 2023

View Solution

$A$ polaroid is placed at $45^o$ to an incoming light of intensity $I_0$. Now the intensity of light passing through the polaroid after polarisation would be

Medium

View Solution

Consider the following statements $A$ and $B$ and identify the correct answer:
$A$. Polarised light can be used to study the helical surface of nucleic acids.
$B$. Optical axis is a direction and not any particular line in the crystal.

Easy

View Solution

Unpolarized light falls on two polarizing sheets placed one on top of the other. What must be the angle between the characteristic directions of the sheets if the intensity of the final transmitted light is one-third the maximum intensity of the first transmitted beam.......$^o$

Medium

View Solution

After passing through a polariser,a linearly polarised light of intensity $I$ is incident on an analyser making an angle of $30^{\circ}$ with that of the polariser. The intensity of light emitted from the analyser will be

EasyNEET 2022

View Solution

Vedclass Products

For Students

Vedclass Test Series

Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.

Start Free Trial

For Teachers

Exam Paper Generator

Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.

Try Free

For Institutes

Online Exam Module

Live online exams with unlimited students, 360° analytics & white-label branding.

See Demo

Similar Questions

An unpolarised light of intensity $I$ is passed through two polaroids kept one after the other with their planes parallel to each other. The intensity of light emerging from the second polaroid is $\frac{I}{4}$. The angle between the pass axes of the polaroids is (in $^{\circ}$)

$A$ polaroid is placed at $45^o$ to an incoming light of intensity $I_0$. Now the intensity of light passing through the polaroid after polarisation would be

Consider the following statements $A$ and $B$ and identify the correct answer:$A$. Polarised light can be used to study the helical surface of nucleic acids.$B$. Optical axis is a direction and not any particular line in the crystal.

Unpolarized light falls on two polarizing sheets placed one on top of the other. What must be the angle between the characteristic directions of the sheets if the intensity of the final transmitted light is one-third the maximum intensity of the first transmitted beam.......$^o$

After passing through a polariser,a linearly polarised light of intensity $I$ is incident on an analyser making an angle of $30^{\circ}$ with that of the polariser. The intensity of light emitted from the analyser will be

Vedclass Test Series

Exam Paper Generator

Online Exam Module

Consider the following statements $A$ and $B$ and identify the correct answer:
$A$. Polarised light can be used to study the helical surface of nucleic acids.
$B$. Optical axis is a direction and not any particular line in the crystal.