Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • Engineering
  • What is the minimum thickness of a soap bubble needed for constructive interference in reflected height, if the light incident on the film is

What is the minimum thickness of a soap bubble needed for constructive interference in reflected height, if the light incident on the film is 1500 \mathrm{~nm} ? Assume that the refractive index for the film is \mathrm{n}=1.33 :

Option: 1

282 nm


Option: 2

70.5 nm


Option: 3

282 nm


Option: 4

387 nm


Answers (1)

best_answer

We have, \mathrm{ 2 \mu \mathrm{t}=\frac{\lambda}{2}}
\mathrm{ \Rightarrow Minimum \, \, thickness, \mathrm{t}=\frac{\lambda}{4 \mu}=\frac{1500 \times 10^{-9}}{4 \times 1.33}=282 \mathrm{~nm}}

Posted by

Info Expert 30

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: NTA debars 39 candidates for 3 years on account of using unfair means
anam-khan

JEE Main 2024 session 2 paper 2 answer key objection window closes today; fees
anam-khan

JEE Main 2024 Topper: Farmer’s son Gajare Nilkrishna says ‘keep questioning until you understand’

Latest Question