How was invisible electromagnetic radiation discovered?

Hint: We consider those things to be invisible which our human eye cannot detect. Things which are even tinier than the human eye can sense and capture are termed as invisible. Thus, we shall look at those electromagnetic radiations from the electromagnetic spectrum which the human eye cannot detect and try to know more about their discovery.

Complete answer:
Into the world of physics came a London bookbinder’s apprentice named Michael Faraday and a young Scottish lad named James Clerk Maxwell in the 1800s. Together, Michael and James Maxwell made one of the greatest discoveries of all time. Faraday was convinced by the experiments he performed that magnetic and electric forces were not the telekinetic action at a distance but were actually the consequences of some hidden physical thing. He named that physical thing a field because it was away from the object.
Inspired by this idea, Maxwell put together the experimental results on paper using mathematics. He showcased that we can describe all of electricity and magnetism with the idea of a field, a single electromagnetic field which permeates through all of space. There are numbers telling you the strength and direction of the electromagnetic field. The mathematical equations he used to describe these numbers also relate the strength of the field at one point in space to its effects and its strength at nearby points respectively.

Note:
It is this electromagnetic field and the way it changes from point to point that helps to explain how things like magnets and static electricity and your cell phone calls have effects up to long ranges without actually being telekinesis displaying action at a distance.