Chapter 9, Problem 3STP

To determine

To Choose: The correct option.

Answer to Problem 3STP

Option D

Explanation of Solution

Introduction:

The upward point on a wave where the medium particle having maximum displacement from mean position is situated is called crest whereas the downward point opposite to the crest is called trough.

The given figure represents a sinusoidal wave.

  

When a wave travels through any medium, the energy of wave displace the medium particle from its rest position.

The upward point on wave at maximum displacement from mean position is called ‘Crest’ and just the next point at maximum displacement in downward direction is called ‘Trough’.One consecutive pair of ‘Crest’ and ‘Trough’ makes one cycle of the wave.Here 'H' is representing ‘trough’ of the wave. So, the option D is correct.

When a wave travels through any medium, the energy of wave displace the medium particle from it’s rest position and the maximum displacement attained by the medium particle is called amplitude of the wave.So, the option A is incorrect.

Wavelength is distance between crest and trough. So, the option B is incorrect.

Crest is top most part of wave. So, the option C is incorrect.

Conclusion:

Thus, the option D is correct.