Final answer:
Convolution in signal processing to show how a periodic pulse train is formed from the interaction of an impulse train and a unit rectangle.
Step-by-step explanation:
The concept of signal processing within the field of Physics, particularly focusing on convolution and how it applies to the formation of signals. Convolution is a mathematical operation that can demonstrate how two signals interact to produce a third signal.
In this case, the aim is to show how a periodic pulse train can be formed by the convolution of an impulse train with a unit rectangle. This involves understanding the principles of signal manipulation and the impact of the convolution operation on the shape and properties of a signal.