Physics Electron, Photon, Photoelectric Effect and X-rays MHT CET Previous Year Question MCQ (Single Correct)

According to de-Broglie hypothesis, the wavelength associated with moving electron of mass is . Using mass energy relation and Planck's quantum theory, the wavelength associated with photon is . If the energy of electron and photon is same then relation between and is

A
B

C
D

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The correct answer is:
B

For the electron (by de Broglie hypothesis):

So,

Thus,

For photon (using Planck relation):

Substitute :

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