Question

What are the properties of interference?

Answer 1

Interference

1. The phenomenon in which two or more waves superpose to form a resultant wave of greater, lower, or the same amplitude is called interference.
2. There are two types of interference:
   2.1 Constructive interference: In constructive interference, the two waves travel in the same direction and are in phase with each other, their amplitude gets added, and the resultant wave is obtained.
   2.2 Destructive interference: Destructive interference is a type of wave interference that takes place in any location along with the medium when the two waves that interfere with each other have a displacement in the opposite direction.
   
3. Lightwave and sound waves both show interference.
4. Two or more waves superpose to form interference.
5. The waves must have the same amplitude or nearly the same amplitude.
6. The frequency of the constituent waves has to be the same or nearly the same.
7. The constituent waves have to propagate in the same direction.