Published by:
CGP EDU Academic Team
Published on: August 13, 2026
For a certain incident wavelength on a metal surface, the max KE of the photoelectron is 
. If the incident wavelength is doubled, then the max 
changes to 
. Then find the threshold wavelength for the metal surface.
A
B
C
D
can't be determined
Text Solution
Verified by ExpertsThe correct answer is:
B
.
.
Multiply equation (2) by 2
eq (1) - eq (3) we get
So,
──────────────────────────────────────────────────────────────────────────────────────────
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
PART-I PHYSICS
A balloon is rising up with constant velocity of . At a height of , a small stone …
For the force equation . Find dimensions of ?
A particle starts from rest with acceleration where and are constant. Find its displacement betw…
If velocity of photon is and that of electron is , then find the ratio of of electron to photon …
Two soap bubbles of radius and combine isothermally to form a new soap bubble. Find the radius of…
Two dipoles and are perpendicular to each other, are placed in a uniform magnetic filed such that…