Lesson: Chapter 4 — Waves and their applications

4.1.3. Describing a wave 2 of 6 Reset answers

Clear all your answers?

This erases every answer in this set and starts you again at question one. Your score will be gone.

Type these four numbers to confirm:

Those numbers don't match. Look at them again and type them.

Yes, clear Keep them

Question 2

On a graph of displacement against distance, which distance equals one wavelength?

A From the axis up to a crest B From a crest to the next crest C From the source to the first crest D From a crest to the next trough

The right answer is the one marked above.

From a crest to the next crest. Neighbouring crests are in exactly the same state of motion, so the distance between them is λ.

Crest to the next trough is only half a wavelength, and the axis to a crest is the amplitude.

Answer the question to continue.