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What should be the velocity of an electr...

What should be the velocity of an electron so that its momentum becomes equal to that of a photon of wavelength 5200 Å ?

A

(A) 700 m/s

B

(B) 1000 m/s

C

(C) 1400 m/s

D

(D) 2800 m/s

Text Solution

Verified by Experts

The correct Answer is:
C
`m_ev_e = (h)/(lambda)`
`=(6.63xx 10^(-34))/((5200xx10^(-10)xx9.1xx10^(-31)`
`~~1400 m//s.`
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