Published by:
CGP EDU Academic Team
Published on: August 23, 2026
When light of wavelength 
falls on a metal of threshold energy 
, the de-Broglie wavelength of emitted electrons is Å. (Round off to the Nearest Integer).
[Use: 
Text Solution
Verified by ExpertsThe correct answer is:
9
(9) Energy incident 
Now using
.
K.E.
K.E. 
for debroglie wavelength 
so 
hence 
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