Question

Problem 12

Answer 1

Given information

It's vital to remember that even if a person sitting at point D in Fig. 12–16 hears nothing (or almost nothing), sound is emanating from both speakers.

When one of the speakers is switched off, the sound from the other speaker is plainly audible.

Only selected wavelengths will entirely destructively interact at a given spot if a loudspeaker produces a wide range of frequencies.

Step-by-step explanation

Step 1.

Point C is located on the crest of source A and B's fifth crest. And point D is located on source B's fifth crest and source A's fifth trough.

 

If the frequency of the waves changes, the speed of the waves does not vary. The only thing that determines speed is the medium.

 

The wavelength of sound waves grows as the frequency of the waves lowers. The spots D and C on the same waves in the illustration will be further apart as the wavelengths of the waves get longer.