The information age in which we live is based almost entirely on the physics of electromagnetic (EM) waves.
We are now globally connected by TV, cellphone and internet.
All these gadgets use EM waves as carriers for transmission of signals.
Energy from the Sun, an essential requirement for life on Earth, reaches us by means of EM waves that travel through nearly 150 million km of empty space.
There are EM waves from light bulbs, heated engine blocks of automobiles, x-ray machines, lightning flashes, and some radioactive materials.
Stars, other objects in our milky way galaxy and other galaxies are known to emit EM waves.
Hence, it is important for us to make a careful study of the properties of EM waves.