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When a certain metallic surface is irradiated with monochromatic light wavelength λ, the stopping potential for photoelectric current is 3 V0. When the same surface is irradiated with light of wavelength 2 λ, the stopping potential is V0. The threshold wavelength for the given surface is
  • a)
  • b)
  • c)
  • d)
    4λ/3
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
When a certain metallic surface is irradiated with monochromatic light...

where hc/λ0 = ϕ (λ0 - threshold wavelength)
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When a certain metallic surface is irradiated with monochromatic light wavelength λ, the stopping potential for photoelectric current is 3 V0. When the same surface is irradiated with light of wavelength 2 λ, the stopping potential is V0. The threshold wavelength for the given surface isa)4λb)6λc)8λd)4λ/3Correct answer is option 'A'. Can you explain this answer?
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