Question

question 14 (multiple choice worth 3 points) ou.01gamma rays are produced by applying electric and magnetic fields at right angles to each other electric and magnetic fields parallel to each other crests and troughs at right angles to each other crests and troughs parallel to each other

Explanation:

Gamma rays are electromagnetic waves. Electromagnetic waves consist of oscillating electric and magnetic fields that are perpendicular (at right angles) to each other and to the direction of wave propagation. The options about crests and troughs relate to mechanical waves (like water waves), not electromagnetic waves (including gamma rays). So the correct option is the one with electric and magnetic fields at right angles to each other.

Answer:

A. electric and magnetic fields at right angles to each other (assuming the first option with this description is labeled A; adjust label as per actual question's option numbering, but the content is "electric and magnetic fields at right angles to each other")