Question

When two waves of the same amplitude and frequency but having a phase difference of $\varphi$ travelling with the same speed in the same direction (positive x) meets at a point then

• A. their resultant amplitude will be twice that of a single wave but the frequency will be same
• B. their resultant amplitude and frequency will both be twice that of a single wave
• C. their resultant amplitude will depend on the phase angle while the frequency will be the same
• D. the frequency and amplitude of the resultant wave will depend upon the phase angle

Answer 1

The correct option is C their resultant amplitude will depend on the phase angle while the frequency will be the same

When the two waves of same amplitude & frequency having phase difference $\varphi$, meets, travelling in the same direction, their resultant amplitude will depend on the phase difference.

While frequency will remain same.

Hence option (C) is correct.