Dual Nature Of Light Question 363
Question: A photon of frequency/causes the emission of a photoelectron of maximum kinetic energy $ E_{k} $ from a metal. If a photon of frequency 3f is incident on the same metal, the maximum kinetic energy of the emitted photoelectron
Options:
A) equals $ 3E_{k} $
B) is greater than $ 3E_{k} $
C) is less than $ 3E_{k} $
D) may be equal to, less than or, greater than $ 3E_{k} $
Show Answer
Answer:
Correct Answer: B
Solution:
[b] We write Einstein’s equation for the photoelectric effect, $ hf-W=E_{K} $ ….(i) $ 3hf-W=E{’{K}} $ …(ii) From (i) and (ii), we get, $ E{’{K}}-3E_{K}=2W>0. $
BETA
