One \( \mathrm{MeV} \) position encounters \( 1 \mathrm{MeV} \) electron travelling in opposite ...

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One \( \mathrm{MeV} \) position encounters \( 1 \mathrm{MeV} \) electron travelling in opposite direction. What is the wavelength of photons produced ? Given rest mass energy of electron or positron \( =0.512 \mathrm{MeV} \) and \( h=6.62 \times 10^{-34} \mathrm{Js} \)
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