A certain metallic surface is illuminated with monochromatic
light of wavelength ????. The stopping potential for photoelectric
current for this light is 3V₀. If the same surface is
illuminated with light of wavelength 2????, the stopping
potential is V₀. The threshold wavelength for this surface
for photo-electric effect is [2015]
(a) 4???? (b) ????/4
(c) ????/6
(d) 6????
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i dont know about this question
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Your answer is 4????
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