Answer :
Interference in waves occurs when two or more waves meet at the same point in space and interact with each other. There are two main types of interference: constructive interference and destructive interference.
1. **Constructive Interference:** This occurs when two waves are in phase, meaning their crests and troughs align. When these waves combine, they amplify each other, resulting in a wave with a larger amplitude. For example, if two waves with peaks coincide, their amplitudes add up, creating a wave with a higher peak.
2. **Destructive Interference:** This happens when two waves are out of phase, meaning their crests align with the troughs. When these waves meet, they tend to cancel each other out, leading to a wave with a reduced or zero amplitude. For instance, if a peak meets a trough, they can cancel each other, resulting in a wave with decreased or no amplitude.
Interference can be seen in various wave phenomena like light waves, sound waves, and water waves. It plays a crucial role in understanding wave behavior and how waves interact with each other in different situations.
