A $γ$ -ray of energy $900$ $M e V$ is absorbed by :
electron-positron pair
photo electric effect
proton-antiproton pair
producing heat in the substance

photo electric effect

proton-antiproton pair

electron-positron pair

producing heat in the substance

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A γ -ray of energy 900 MeV is absorbed by :electron-positron pairphoto electric effectproton-antiproton pairproducing heat in the substance

A $γ$ -ray of energy $900$ $M e V$ is absorbed by :
electron-positron pair
photo electric effect
proton-antiproton pair
producing heat in the substance