Question

the wavelength of a wave is defined as:
select one:
the distance between the highest and lowest parts of a wave.
one - half the distance from crest to crest.
how often a wave goes up and down.
the distance from crest to crest.

Explanation:

• The distance between the highest (crest) and lowest (trough) parts of a wave is the amplitude.
• One - half the distance from crest to crest is not a standard wave - related definition.
• How often a wave goes up and down is the frequency.
• The wavelength of a wave is defined as the distance from crest to crest (or trough to trough).

Answer:

the distance from crest to crest.