Question

As the speed and length of a wave decreases, the wave _____.

Answer 1

The  speed of a wave measures how far one particular crest (or trough) moves in a given amount of time. The speed of the wave changes according to the following equation:

v  =  λ * f

According this equation, it follows that as the speed and length of a wave decreases, the wave grows higher (the higher the frequency).

Answer 2

The answer is {B. Grows higher}