Light of wavelength λ, strikes a photoelectric surface and electrons are ejected with an energy E. If E is to be increased to exactly twice its original value, the wave length changes to 
, where
A
is less than 
B
is greater than 
C
is greater than 
but less than λ D
is exactly equal to 
Text Solution
Verified by ExpertsThe correct answer is:
C
Energy of photoelectron, 
…… .(i)
where, 
is the work function for the metal surface (constant).
When 
, then
…… ..(ii)
Dividing Eq. (i) by Eq. (ii), we get
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