Question

Two sources are producing waves on the same string, they interfere constructively at a point A. The disturbances produced by the two sources have to be:

• A. Maximum disturbance
• B. Minimum disturbance
• C. Any disturbances
• D. The same disturbances (same phase)

Answer 1

The correct option is D The same disturbances (same phase)

Remember what you just learned; for constructive interference the only criteria is that the two waves have to be in the same phase. They may have any displacement, just that they have to be the same.