NEET | 2016Work, Power and EnergyHard

Question

An electron of mass m and a photon have same energy E. the ratio of de-Broglie wavelengths associatedwith them is:

Options

A.

1cE2m12

B.

E2m12

C.

c(2mE)1/2

D.

1c2mE12

Solution

De-Broglie wavelength is given by
λe=hp=h2m.E for electron
De-Broglie wavelength of photon is given by
λp=hp=hEp=hcE
λeλp=12mE.Ec=1cE2m

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