Three sources of sound `S_1, S_2 and S_3 of equal intensity are placed in a straight line with `S_1S_2=S_2=S_3`. At a point P. far away from the sources, the wave coming from `S_2 si 120^@` ahead in phase of that from `S_1`. Also, the wave coming from `S_3 is 120^@` ahead of that from `S_2`. What would be the resultant intensity of sound at P?

Three sources of sound S_(1),S_(2) and S_(3) of equal intensity are placed in a straight line with S_(1)S_(2) = S_(2)S_(3) shown in the figure. At a point P, far away from the sources, the wave coming from S_(2) is 120^(@) ahead in phase of that from S_(1), Also, the wave coming from S_(3) is 120^(@) ahead of that from S_(2). What would be the resultant intensity of sound at P ?

If S_1, S_2 and S_3 be respectively the sum of n, 2n and 3n terms of a G.P .Prove that S_1(S_3-S_2)=(S_2-S_1)^2 .

Two sources of sound, S_1 and S_2 , emitting waves of equal wavelength 20.0 cm, are placed with a separation of 20.0 cm between them. A detector can be moved on a line parallel to S_1S_2 and at a distance of 20.0 cm from P it. Initially, the detector is equidistant from the two sources. Assuming that the waves emitted by the sources are in phase, find the minimum distance through wffich the detector should be shifted to detect a minimum of sound.

Two sources of sound, S_1 and S_2 , emitting waves of equal wavelength 20.0 cm, are placed with a separation of 20.0 cm between them. A detector can be moved on a line parallel to S_1S_2 and at a distance of 20.0 cm from P it. Initially, the detector is equidistant from the two sources. Assuming that the waves emitted by the sources are in phase, find the minimum distance through wffich the detector should be shifted to detect a minimum of sound.

A coherent light is incident on two paralle slits S_(1) and S_(2) . At a point P_(1) the frings will be dark if the phase difference between the rays coming from S_(1) and S_(2) is

S_(1) and S_(2) are two coherent sources of sound of frequency 110Hz each they have no initial phase difference. The intensity at a point P due to S_(1) is I_0 and due to S_2 is 4I_0 . If the velocity of sound is 330m//s then the resultant intensity at P is

S_(1) and S_(2) are two coherent sources of sound of frequency 110Hz each they have no initial phase difference. The intensity at a point P due to S_(1) is I_0 and due to S_2 is 4I_0 . If the velocity of sound is 330m//s then the resultant intensity at P is

Two sources of sound S_1 and S_2 vibrate at same frequency and are in phase. The intensity of sound detected at a point P as shown in the figure is I_0 . (a) If theta equals 45^@ , what will be the intensity of sound detected at this point if one of the sources is switched off ? (b) What will be the answer of the previous part if theta= 60^@ ?

Two sources of sound S_1 and S_2 vibrate at same frequency and are in phase. The intensity of sound detected at a point P as shown in the figure is I_0 . (a) If theta equals 45^@ , what will be the intensity of sound detected at this point if one of the sources is switched off ? (b) What will be the answer of the previous part if theta= 60^@ ?

Two source of sound, S_(1) and S_(2) , emitting waves of equal wavelength 2 cm , are placed with a separation of 3 cm between them. A detector can be moved on a line parallel to S_(1) S_(2) and at a distance 24 cm from it. Initially, the detecor is equidistant from the two sources. Assuming that the waves emitted by the sources are in phase, find the minimum distance through which the detector should be shifted to detect a minimum of sound.