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JEE Main Physics Class 12 Dual Nature of Matter and Radiation Part 1 Questions
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Question : 82
Total: 100
Photoelectrons are ejected from a metal when light of frequency
υ
falls on it. Pick out the wrong statement from the following.
[Online May 26, 2012]
No electrons are emitted if
υ
is less than W/h, where W is the work function of the metal
The ejection of the photoelectrons is instantaneous.
The maximum energy of the photoelectrons is h
υ
.
The maximum energy of the photoelectrons isindependent of the intensity of the light.
Validate
Solution:
According to photo-electric equation:
K
.
E
max
=
h
v
−
h
v
0
(Work function)
Some sort of energy is used in ejecting the photoelectrons.
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