The displacement of a vibrating string versus position along the string is shown in the figure. The periodic waves have a speed of 10.0 cm/s. A and B are two points on the string.
-What is the wavelength of the wave?
A)3.0 cm
B)6.0 cm
C)9.0 cm
D)12 cm
E)15 cm

Question

The displacement of a vibrating string versus position along the string is shown in the figure. The periodic waves have a speed of 10.0 cm/s. A and B are two points on the string. 
-What is the wavelength of the wave?
A)3.0 cm 
B)6.0 cm 
C)9.0 cm 
D)12 cm 
E)15 cm

Quizplus · Accepted Answer

The wavelength is the distance between two consecutive peaks (or troughs) of the wave. From the graph, we can see that the distance between point A and point B is one wavelength. Thus, the wavelength is the distance between A and B, which is approximately 6.0 cm.

The Displacement of a Vibrating String Versus Position Along the String