Question

The equation of an incident wave travelling along +X direction is given by y= A sin (2t-5x). This wave gets reflected at a rigid boundary. The change in phase of the wave is

• A. $\pi /2$ radians
• B. $\pi$ radians
• C. $\pi /3$ radians
• D. $2\pi /3$ radians

Answer 1

The correct option is B $\pi$ radians

A reflected wave will be $\pi$ radians out of phase with the incident wave
The correct option is (b)