In a material medium, when a positron meets an electron both the particles annihilate leading to the emission of two gamma ray photons. This process forms the basis of an important diagnostic procedure called
Answer & explanation
Correct answer: option 2
In a material medium, when a positron meets an electron both the particles annihilate leading to the emission of two γ ray photons. This process forms the basis of an important diagnestic procedure called PET.