When light of wavelength 
is incident on metal surface, the ejected fastest electron has speed 
. If the wavelength is changed to 
, the speed of the fastest emitted electron will be
A
Smaller than 
B
Equal to 
C
Greater than 
D
Equal to 
Text Solution
Verified by ExpertsThe correct answer is:
C
From Einstein's photoelectric effect equation,
…… ..(i)
……… (ii)
Multiplying Eqs. (i) with 
,
……… .(iii)
On subtracting equation (ii) from equation (iii),
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