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12 June, 23:37

Photons of energy 7.0 eV strike a metal whose work function is 2.3 eV. KE of the most energetic photoelectron is

5.2 eV

3.8 eV

4.7 eV

7.4 eV

9.3 eV

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  1. 13 June, 00:53
    0
    The kinetic energy of the most energetic photoelectron is 4.7 eV. This was obtained by subtracting the energy of the photon that excited that electron from its work function. By doing this, the excess energy is equal to the kinetic energy of the photoelectron.
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