If is the momentum of the fastest electron ejected from a metal surface after irradiation of light having wavelength , then for momentum of the photoelectron, the wavelength of the light should be:

Question

If  is the momentum of the fastest electron ejected from a metal surface after irradiation of light having wavelength , then for  momentum of the photoelectron, the wavelength of the light should be: (Assume KE  work function)

Canvas Classes · Accepted Answer

Since KE  work function:

... (1)

For momentum :
 ... (2)

Dividing (1) by (2):

Answer: Option (1)

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