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  4. What should be the velocity of an electron so that its momentum, becomes equal to that of a photon of wavelength text100 text μ textA ?

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Q. What should be the velocity of an electron so that its momentum, becomes equal to that of a photon of wavelength $ \text{1}00\text{ }\mu \text{A} $ ?

JamiaJamia 2014

Solution:

Momentum $ \frac{3}{2}\text{m}/\text{s} $ $ \frac{2}{3}\text{m}/\text{s} $ $ {{\lambda }_{0}}, $ $ \frac{25}{16}{{\lambda }_{0}} $ $ \frac{27}{20}{{\lambda }_{0}} $ $ \frac{20}{27}{{\lambda }_{0}} $