Published by:
CGP EDU Academic Team
Published on: September 12, 2026
A monochromatic light wave with wavelength 
and frequency v 1 in air enters another medium. If the angle of incidence and angle of refraction at the interface are 45° and 30° respectively, then the wavelength 
and frequency v 2 of the refracted wave are:
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
D
By using Snell's law,
, the refractive index is
Also using the relation n= 
where n is the refractive index, c is the velocity of light in air and v is the velocity in the medium
The velocities are given by
and 
The frequency of light does not change when the medium changes.
Prepare Smarter with CGP Edu
Get practice questions, solutions, and test series in one place.
Write a Review
Share your experience with this question and solution.
Commentary
Send your comment, doubt, correction, or feedback to admin.
Similar Questions
Explore conceptually related problems
If a wave gets refracted into a denser medium, then which of the following is true?
The refracting angle of a prism is A and refractive index of the material of the prism is cot (A/2)…
A small bulb is placed at the bottom of a tank containing water to a depth of m. The refractive in…
An observer can see through a small hole on the side of a jar (radius ) at a point at height of f…
Consider following statements for refraction of light through prism, when angle of deviation is min…
Consider light travelling from a medium to medium separated by a plane interface. If the light un…