Question

What is the type of interference that takes place at a node?

Answer 1

Destructive interference:

1. Destructive interference takes place when waves come together in such a manner that they completely cancel each other out. When two waves destructively interfere, they must have the same amplitude in opposite directions.
2. When two waves of similar frequencies travel in a medium, the resultant at different points is dissimilar from the sum of their intensities because of their superposition. At one point it is too less and negligible, This is known as Destructive Interference.
3. A node is a point where there is always destructive interference.

An illustrative diagram of destructive interference is shown below.