In the figure below, which letters represent the crest and trough?

Question

Quizplus · Accepted Answer

In a wave, the highest point is called the crest and the lowest point is called the trough. In the given figure, the points C and D are the highest and lowest points respectively, hence they represent the crest and trough. Point A and B are the points halfway between the crest and the trough, which are called the equilibrium position. Point E is also a high point, but not as high as point C, hence it cannot represent the crest. Point E is also not the lowest point, hence it cannot represent the trough. Therefore, the correct choice is C) C and D.

In the Figure Below, Which Letters Represent the Crest and Trough