Which term describes the horizontal distance between the crests or the troughs of adjacent waves?

Which term describes the horizontal distance between the crests or the troughs of adjacent waves?

• A. The part of a longitudinal wave where the particles are close together
• B. How many wave peaks pass a certain point per given time
• C. The lowest point of a transverse wave
• D. Horizontal distance between the crests or between the troughs of two adjacent waves

Answer: (D)

Wavelength is the distance along the direction the wave travels between repeating features, typically from one crest to the next crest (or from one trough to the next trough). This spacing is the horizontal distance you’d measure between adjacent peaks or valleys, and it’s the key way we describe how long one cycle of the wave lasts in space. It’s measured in meters. The other ideas refer to different aspects: the part of a longitudinal wave where particles are close together describes a compression, not a spacing between repeating features; how many wave peaks pass a point per time describes frequency, a rate; and the lowest point of a transverse wave is a trough, not the distance between repeats.

Wavelength is the distance along the direction the wave travels between repeating features, typically from one crest to the next crest (or from one trough to the next trough). This spacing is the horizontal distance you’d measure between adjacent peaks or valleys, and it’s the key way we describe how long one cycle of the wave lasts in space. It’s measured in meters.

The other ideas refer to different aspects: the part of a longitudinal wave where particles are close together describes a compression, not a spacing between repeating features; how many wave peaks pass a point per time describes frequency, a rate; and the lowest point of a transverse wave is a trough, not the distance between repeats.