Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa

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 initial shape of the wavefront of the beam is 

  • Option 1)

    planar

  • Option 2)

    convex

  • Option 3)

    concave

  • Option 4)

    convex near the axis and concave near the periphery

 

Answers (1)

best_answer

As we learnt in

Refractive index -

\mu = \frac{c}{v}
 

- wherein

c= speed of light in vacuum.

v= speed of light in medium.

 

 For a parallel cylindrical beam, wavelength will be planar.

Correct option is 1.

 


Option 1)

planar

This is the correct option.

 

Option 2)

convex

This is an incorrect option.

Option 3)

concave

This is an incorrect option.

Option 4)

convex near the axis and concave near the periphery

This is an incorrect option.

Posted by

prateek

View full answer

JEE Main high-scoring chapters and topics

Study 40% syllabus and score up to 100% marks in JEE

Similar Questions

Trending Articles/News

anam-khan

JEE Main 2024 session 2 result date announced; Steps to check NTA session 2 scores
anam-khan

JEE Main 2024 session 2 final answer key soon at jeemain.nta.ac.in; result on April 25
anam-khan

JEE Main 2024 Session 2: Last day to challenge answer key today

Latest Question