Related Questions

    1.

    In Lenard's experiment, the stopping potential for photoelectrons emitted from a metal surface illuminated by light of wavelength Ξ»1\lambda_1 is V1V_1. When the wavelength is changed to Ξ»2\lambda_2 (Ξ»2>Ξ»1\lambda_2 > \lambda_1), the stopping potential becomes V2V_2. If the work function of the metal is Ο•\phi, which of the following relations is correct?

    A

    hc(1Ξ»1βˆ’1Ξ»2)=eV1βˆ’eV2hc(\frac{1}{\lambda_1} - \frac{1}{\lambda_2}) = eV_1 - eV_2

    B

    hc(1Ξ»2βˆ’1Ξ»1)=eV1βˆ’eV2hc(\frac{1}{\lambda_2} - \frac{1}{\lambda_1}) = eV_1 - eV_2

    C

    hc(1Ξ»1βˆ’1Ξ»2)=eV2βˆ’eV1hc(\frac{1}{\lambda_1} - \frac{1}{\lambda_2}) = eV_2 - eV_1

    D

    hc(1Ξ»1+1Ξ»2)=eV1+eV2hc(\frac{1}{\lambda_1} + \frac{1}{\lambda_2}) = eV_1 + eV_2

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