Question is based on the following paragraph.

An initially parallel cylindrical beam travels in a medium of refractive index  \mu (I)=\mu _{0}+\mu _{2}I,where\;\mu _{0}\; and\; \mu _{2} are positive constants and I is the intensity of the light beam. The intensity of the beam is decreasing with increasing radius.

Question: The speed of light in the medium is

  • Option 1)

    maximum on the axis of the beam

  • Option 2)

    minimum on the axis of the beam

  • Option 3)

    the same everywhere in the beam

  • Option 4)

    directly proportional to the intensity I

 

Answers (1)

As we learnt in

Refractive index -

\mu = \frac{c}{v}
 

- wherein

c= speed of light in vacuum.

v= speed of light in medium.

 

 Velocity of light reduces radically.

Correct option is 2.

 


Option 1)

maximum on the axis of the beam

This is an incorrect option.

Option 2)

minimum on the axis of the beam

This is the correct option.

Option 3)

the same everywhere in the beam

This is an incorrect option.

Option 4)

directly proportional to the intensity I

This is an incorrect option.

Most Viewed Questions

Preparation Products

Knockout JEE Main April 2021 (One Month)

Personalized AI Tutor and Adaptive Time Table, Self Study Material, Weekend Live Classes, Unlimited Mock Tests and Personalized Analysis Reports, 24x7 Doubt Chat Support,.

₹ 14000/- ₹ 4999/-
Buy Now
Knockout JEE Main May 2021

Personalized AI Tutor and Adaptive Time Table, Self Study Material, Weekend Live Classes, Unlimited Mock Tests and Personalized Analysis Reports, 24x7 Doubt Chat Support,.

₹ 22999/- ₹ 9999/-
Buy Now
Test Series JEE Main May 2021

Unlimited Chapter Wise Tests, Unlimited Subject Wise Tests, Unlimited Full Mock Tests, Get Personalized Performance Analysis Report,.

₹ 6999/- ₹ 2999/-
Buy Now
Knockout JEE Main May 2022

Personalized AI Tutor and Adaptive Time Table, Self Study Material, Live Classes, Unlimited Mock Tests and Personalized Analysis Reports, 24x7 Doubt Chat Support,.

₹ 34999/- ₹ 24999/-
Buy Now
JEE Main Rank Booster 2021

Booster and Kadha Video Lectures, Unlimited Full Mock Test, Adaptive Time Table, 24x7 Doubt Chat Support,.

₹ 13999/- ₹ 6999/-
Buy Now
Boost your Preparation for JEE Main 2021 with Personlized Coaching
 
Exams
Articles
Questions