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Question

The wavelength of de broglie waves associated with a beam of protons of kinetic energy 5×102eV.
(Mass of each photon=1.67×1027Kg, h=6.62×1034Js.)

A
2.42×1012m
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B
4.24×1012m
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C
1.82×1012m
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D
1.28×1012m
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