When radiation of wavelength ' 
' is incident on a metallic surface, the stopping potential is 
. If the surface is illuminated with radiation of double the wavelength then the stopping potential becomes 1.6 V. The threshold wavelength for the surface is
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
B
By photoelectric equation
...(i) 
On substrating equation (ii) from equation (i)
By equation (ii),
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