When radiation of wavelength 
is incident on a metallic surface, the stopping potential of ejected photoelectrons is 4.8V. If the same surface is illuminated by radiation of double the previous wavelength, then the stopping potential becomes 1.6V. The threshold wavelength of the metal is:
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
B
...(i)
...(ii)
….(iii)
Using above equation (i) - (ii) 
….(iii)
Put in equation (ii) 
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