A sound source, detector and a cardboard are arranged as shown in figure. The wave is reflected from the cardboard at the line symmetry of source edetector. Initially the path difference between the reflected wave and the direct wave is one third of the wavelength of sound. Find the minimum distance by which the cardboard should be moved upwards so that both waves are in phase.

When a sound wave is reflected from a wall the phase difference between the reflected and incident pressure wave is:

When a sound wave is reflected from a wall the phase difference between the reflected and incident pressure wave is:

When a sound wave is reflected from a wall the phase difference between the reflected and incident pressure wave is:

A sound sources, detector and a movable wall are arranged as shown in figure. In this arrangement detectir us detacting the maximum intensity. If the speed of sound is 330 m//s in air and frequency of source is 660 Hz , then find the minimum distance by which the wall should be moved away from source, so that detector dtects minimmum intensity.

A sound sources, detector and a movable wall are arranged as shown in figure. In this arrangement detectir us detacting the maximum intensity. If the speed of sound is 330 m//s in air and frequency of source is 660 Hz , then find the minimum distance by which the wall should be moved away from source, so that detector dtects minimmum intensity.

A sound wave travelling along an air column of a pipe gets reflected at the open end of the pipe. What is the phase difference between the incident and reflected waves at the open end?

A sound wave travelling along an air column of a pipe gets reflected at the open end of the pipe. What is the phase difference between the incident and reflected waves at the open end?

A sound wave of wavelength 32 cm enters the tube at S as shown in the figure. Then the smallest radius r so that a minimum of sound is heard at detector D is

A source S and a detector D are placed at a distance d apart. A big cardboard is placed at a distance sqrt(2) d from the source and the detector as shown in figure. The source emits a wave of wavelength = d//2 which is received by the detector after reflection from the cardboard. It is found to be in phase with the direct wave received from the source. By what minimum distance should the cardboard be shifted away so that the reflected wave becomes out of phase with the direct wave?