Question

Two wave pulses one with a positive amplitude the other with equal negative amplitude travel on a cord approaching each other. What is the result of the oscillations when the pulses reach the same point?

A. It is constructive interference with twice the amplitude

B. It is destructive interference with zero amplitude

C. It is constructive interference with slightly greater amplitude

D. It is constructive interference with the negative amplitude​

Answer 1

Answer:

The correct answer among the given options is (B) . i.e. It is destructive interference with zero amplitude.

Explanation:

There are two kinds of interferences of waves. Which is given as,

Constructive Interference

• When two waves travel in the same direction and are in the same phase with a constant amplitude which ultimately gives rise to bigger waves having double amplitude than the individual wave is called constructive interference.

Destructive Interference

• When two waves travel in the opposite direction with a constant amplitude which ultimately cancel each other and as a result produce a wave with net-zero amplitude is called destructive interference.

Hence, the correct answer among the given options is (B). i.e. It is destructive interference with zero amplitude.