Question

Interference pattern can be observed due to superposition of the following waves:
A. $y = a \sin \omega t$ B. $y = a \sin 2\omega t$
C. $y = a \sin(\omega t - \phi)$ D. $y = a \sin 3\omega t$
Choose the correct answer from the options given below.

• A. B and C
• B. B and D
• C. A and C
• D. A and B

Answer 1

Answer: (C)

A and C

Answer 2

For an interference pattern to be observed, the sources must be coherent (i.e., have a constant phase difference). Waves A and C satisfy this condition because they have the same frequency and a constant phase difference ϕ.