A wave is reflected by a rigid support, the change in phase due to reflection will be

After reflection from the open end, a transverse progressive wave, $y_1=A\sin 2\pi (\frac{t}{T}-\frac{x}{\lambda })$ travels along the direction of negative $x$-axis. The equation of the reflected wave will be,

When a wave is reflected at a rarer surface, the change in phase is

Not only a change in direction but also a phase change of $\mathrm{\pi }$ radian is suffered by a sound wave, when it suffers

The phenomenon of interference is observed when two sources have

A Quincke's tube is used

In Quincke's tube experiment, the difference in amplitudes is due to

The beats are produced by sounding the two tuning forks together. If wax is put on any one of the forks, then the beat period