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Q.

An electron of mass m and a photon have same energy E. The ratio of wavelength of electron to that of photon is (C-being the velocity of light)

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a

E2m1/2

b

1CE2m1/2

c

C(2mE)1/2

d

1C2mE1/2

answer is B.

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Detailed Solution

λe=h2mE,λph=hcE
λeλph=1CE2m

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An electron of mass m and a photon have same energy E. The ratio of wavelength of electron to that of photon is (C-being the velocity of light)