What is the minimum photon energy needed to create an e- -e+ pair when a photon collides (a) with a free electron at rest and (b) with a free proton at rest?
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What is the minimum photon energy needed to create an e- -e+ pair when a photon collides (a) with a free electron at rest and (b) with a free proton at rest?
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- An electron and an antielectron (each has mass 9.11 x 10-31 kg), each traveling at 0.6c relative to the lab frame, collide head on and annihilate, resulting in the creation of two identical photons which travel away in opposite directions. What is the frequency of each photon?How fast must an electron be moving if all its kinetic energy is lost to a single x-ray photon with the following characteristics? (a) The photon has a wavelength of 3.55 x 10-8 m near the high end of the x-ray electromagnetic spectrum. Your response differs significantly from the correct answer. Rework your solution from the beginning and check each step carefully.c (b) The photon has a wavelength of 3.55 x 10-13 m near the low end of the x-ray electromagnetic spectrum,