All electrons ejected from a surface by incident light of wavelength 200 nm can be stopped before travelling 1 m in the direction of uniform electric field of 
. The work function of the surface is
Text Solution
Verified by ExpertsThe correct answer is:
D
The electron ejected with maximum speed 
are stopped by electric field 
after travelling a distance 
The energy of incident photon 
From equation of photoelectric effect,
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