
Figure shows two coherent sources and which emit sound of wavelength in phase. The separation between the sources is . A circular wire of large radius is placed in such a way that lies in its plane and the middle point of is at the centre of the wire. Find the angular positions on the wire for which constructive interference takes place.



Important Questions on Sound Waves
Two sources of sound and vibrate at same frequency and are in phase. The intensity of sound detected at a point , as shown in the figure, is .
If equals , what will be the intensity of sound detected at this point, if one of the sources is switched off?
What will be the answer of the previous part, if ?






In a resonance column experiment, a tuning fork of frequency is used. The first resonance is observed when the air column has a length of and the second resonance is observed when the air column has a length of .
Find the speed of sound in air.
How much distance above the open end does the pressure node form?

