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For photo-electric effect with incident photon wavelength λ , the stopping potential is V 0 . Identify the correct variation(s) of V 0 with λ and 1 / λ .

1. λ V 0
2. λ V 0
3. 1/ λ V 0
4. 1/ λ V 0

Correct answer: 1/ λ V 0

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