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Gamma rays of photon energy 0.406 MeV are directed onto an aluminum target and are scattered...

Gamma rays of photon energy 0.406 MeV are directed onto an aluminum target and are scattered in various directions by loosely bound electrons there. (a) What is the wavelength of the incident gamma rays? (b) What is the wavelength of gamma rays scattered at 124° to the incident beam? (c) What is the photon energy of the rays scattered in this direction? The electron Compton wavelength is 2.43 × 10-12 m

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