Very often, energy is generated at one place but consumed elsewhere. The transportation of energy from its source to the receiving end can be done in two ways:
The following illustration will help us understand this better.
Let two persons be positioned on the opposite banks of a small lake. If one person wishes to draw the attention of the other person, he can adopt any of the following methods:
In the first method, he is transferring matter in the form of stone or the arrow. In all the other methods, energy is being communicated without the actual transfer of matter. In these methods, the energy is said to be transferred in the form of waves. Other examples of energy propagation by transfer of matter are
