Question

on the following diagram, what part of a wave is shown by letter b?

crest
trough
frequency
wavelength

Explanation:

Identify the wave feature labeled B

Using the Wave Propagation knowledge point

The diagram shows a transverse water wave with several labeled parts:

• A points to the highest point of the wave, which is the crest.
• B measures the horizontal distance between two consecutive crests.
• C points to the lowest point of the wave, which is the trough.

The horizontal distance between two consecutive identical points on a wave (such as crest to crest) is defined as the wavelength. Therefore, letter B represents the wavelength.

Answer:

• Crest
• Trough
• Frequency
• Wavelength (Correct answer)