In photoelectric effect, when certain metallic surface is illuminated with monochromatic light of wavelength 'λ', the stopping potential is '3V'. If the same surface is illuminated with light of wavelength '2λ', the stopping potential is 'V'. The threshold wavelength for this surface is : [MHT-CET 2022]

Question:

In photoelectric effect, when certain metallic surface is illuminated with monochromatic light of wavelength ‘λ’, the stopping potential is ‘3V’. If the same surface is illuminated with light of wavelength ‘2λ’, the stopping potential is ‘V’. The threshold wavelength for this surface is : [MHT-CET 2022]

Options :

(a) 4λ
(b) λ/4
(c) λ/6
(d) 6λ

Answer :

(a) 4λ

Answer Steps :

step 1:

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