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A photon of wavelength 2.78 pm2.78 pm scatters at an angle of 152∘152∘ from an initially...

A photon of wavelength 2.78 pm2.78 pm scatters at an angle of 152∘152∘ from an initially stationary, unbound electron. What is the de Broglie wavelength of the electron after the photon has been scattered?

de Broglie wavelength:

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