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A 20 KeV electron emits two bremsstrahlung photons as it is being brought to rest in two successive decelerations. The wavelength of the second

A 20 KeV electron emits two bremsstrahlung photons as it is being brought to rest in two successive decelerations. The wavelength of the second photon is 1.30 longer than the wavelength of the first. (a) What was the energy of the electron after the first decelera- tion, and (b) what are the wavelengths of the photons?

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