Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • Engineering
  • A light wave travels from medium 1 with a velocity of 2 x 108 m/s to medium 2 with a velocity of 1.5 x 108 m/s. If the angle of incidence is 30 degrees, what is the angle of r

A light wave travels from medium 1 with a velocity of 2 x 108 m/s to medium 2 with a velocity of 1.5 x 108 m/s. If the angle of incidence is 30 degrees, what is the angle of refraction?

Option: 1

5 degrees


Option: 2

10 degrees


Option: 3

22 degrees


Option: 4

60 degrees


Answers (1)

Using the formula

\frac{\sin (i)}{\sin (r)}=\frac{V _1}{V _2},

we can find

\sin (\mathrm{r})=\frac{V _2}{V_ 1} \quad \times \sin (\mathrm{i}).

Substituting values,\sin (r)=(\left(1.5 \times 10^8 \mathrm{~m} / \mathrm{s}\right) /\left(2 \times 10^8 \mathrm{~m} / \mathrm{s}\right)) \times \sin (30)=0.75 \times 0.5=0.375

Taking the inverse sine,

we get the angle of refraction as approximately 22 degrees.

 
 

Posted by

Kshitij

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

BTech aspirant from north-east or UT? Apply for CSAB NEUT counselling 2025 today
anam-khan

JoSAA round 2 cut-off 2025 out; BTech closing ranks for top engineering courses at IITs
anam-khan

Goa Engineering Admission 2025: 1,415 eligible for BE seats; merit list on June 27

Latest Question