Final answer:
This Physics question pertains to the behavior of alpha, beta, and gamma rays in magnetic and electric fields, illustrating the different charges of each and the conventions for defining positive directions.
Step-by-step explanation:
The question relates to Physics and specifically to the behavior of alpha (α), beta (β), and gamma (γ) rays in the presence of magnetic or electric fields. When these rays are passed through a magnetic field, alpha particles bend in one direction due to their positive charge, beta particles bend in the opposite direction because they have a negative charge, and gamma rays do not bend at all, indicating that they are neutral. This observation is consistent with the behavior seen when these rays interact with electric fields. The direct measurement of charge after collection of the radiation provides further confirmation of the charges of alpha, beta, and gamma rays.
In defining the positive direction for motion or field orientation in various contexts, conventions such as the right-hand rule for coordinate axes (x, y, z) or clockwise/counter-clockwise designation for angles may be used. When discussing rotational motion, the conventional positive direction for angular acceleration is typically counter-clockwise rotation.