When radiation of wavelength λ is incident on a metallic surface, the stopping potential is 4.8 V. If the same surface is illuminated with radiation of double the wavelength, then the stopping potential becomes 1.6 V. Then, the threshold wavelength for the surface is
Text Solution
Verified by ExpertsThe correct answer is:
B
From equation,
and 
…… .(i)
and 
…… ..(ii)
On dividing Eq. (i) by Eq. (ii), we get
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