Question

when a wave moves perpendicular to the energy moving through it. transverse wave longitudinal wave wavelength diffraction

Explanation:

To solve this, we recall the definitions of the terms:

• Transverse Wave: A wave where the oscillation (motion of particles) is perpendicular to the direction of energy (wave) propagation.
• Longitudinal Wave: Oscillation is parallel to energy direction (e.g., sound waves).
• Wavelength: Distance between consecutive wave points (not about direction of motion relative to energy).
• Diffraction: Bending of waves around obstacles (not about wave - energy direction relation).

The question describes a wave where motion is perpendicular to energy movement, which matches the definition of a Transverse Wave.

Answer:

A. Transverse Wave