Physics Dual Nature: Photon and Matter Waves The Photoelectric Effect

A surface has work-function 2.4 eV. The kinetic energies of fastest photo electrons emitted from its surface under radiations of photon energies 3.00 eV and 4.00 eV will bear the ratio

1

27 : 32

2

3 : 4

3

1 : 2

4

3 : 8

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