Question 39
Question 39 of 40
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No letter options?
Older MCQs might not have the typical A, B, C, D choices. They have choices 1, 2, 3, and a combination of them is the answer. Below is the key that maps such combinations to the answer.
A 1, 2 and 3 are correct
B 1 and 2 only are correct
C 2 and 3 only are correct
D 1 only is correct
Topics Tested
24. Medical physics
24.3. PET scanning

calculate the energy of the gamma-ray photons emitted during the annihilation of an electron-positron pair

11. Particle physics
11.1. Atoms, nuclei and radiation

describe the composition, mass and charge of α-, β- and γ-radiations (both β− (electrons) and β+ (positrons) are included)