Light of wavelength 
, 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 wavelength changes to 
, where:
A
' 
is less than 
is less than
B
is greater than 
C
is greater than 
but less than 
D
is exactly equal to 
Text Solution
Verified by ExpertsThe correct answer is:
C
Energy of photoelectron is given by equation,
……… (i)
where, W is the work function for the metal surface (constant).
…… ..(ii)
Diving Eq. (i) by Eq. (ii), we get
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