Question

If four wave crests pass a pole each second:

1. What is the speed of the wave?
2. What is it's period?

Answer 1

1. The speed of the wave can be calculated using the formula:
s = number of waves / time
s = 4 waves / 1 s
s = 4 waves / s

2. The period is simply the reciprocal of the speed of the wave or:
P = time / number of waves
P = 1 s / 4 waves
P = 0.24 s/waves