Answer in Physics for Pushpo #163481
Discuss the reflection of waves at a free end of a stretched string. (diagrams are necessary)
What happens to an object, supposedly, a ball when it is thrown against a hard wall? Yes, bounces back. This can be termed as “reflection” experienced by the object. As physics, this aspect can be measured in terms of energy and momentum conservation. In another case, if the collision involving the ball and wall is effortlessly elastic, then, in this case, the incident energy, as well as momentum, is returned. In simple terms, the object or ball will bounce back at the same speed. Furthermore, if the collision tends to be inelastic, the wall (or ball) would absorb a share of the momentum and incident energy. Therefore, the ball wouldn’t bounce back at the same speed.
It is important to note that, waves also carry energy and momentum. Hence, whenever a wave bumps into an obstacle, there is a tendency to reflect after the collision. Some of the well-known wave phenomena such as echoes are a result of reflection of waves. Furthermore, the generation of standing wave is also a result of this wave reflection. Do string waves reflect? Let us know about this.