Question

How much time (as a fraction of the period T) does it required for a wave’s crest (maximum) to reach the position where the trough (minimum) was at t = 0?

Answer 1

Answer:

$\frac{T}{4}$

Explanation:

From the billow figure the wave required T time to complete the length $\lambda$

Now from the figure it is clear that the length between the maximum crest and minimum crest is $\frac{\lambda }{4}$

As the distance is decreases by 4 times so the time will alos decreases by 4 times

So the required time for a wave to reach from maximum crest to minimum crest is $\frac{T}{4}$