Published by:
CGP EDU Academic Team
Published on: August 21, 2026
The work functions of Caesium (Cs), Potassium (K) and Sodium 
are 
, 
and 
respectively. If incident electromagnetic radiation has an incident energy of 
, which of these photosensitive surfaces may emit photoelectrons?
A
only
B
only
C
only
D
Both 
and 
and
Text Solution
Verified by ExpertsThe correct answer is:
For photoelectric effect E ≥ ≥ work function (W)
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