Who invented electromagnetic waves?

Answer 1

Heirich Hertz. Maxwell theorized that light and electricity were the same based on the speed of electric waves and light waves. Hertz actually created the electromagnetic waves and demonstrated their light like behavior. This demonstration confirmed Maxwell's prediction.

Answer 2

James Clerk Maxwell is credited with formulating the theory of electromagnetic waves in the 19th century. He mathematically predicted the existence of electromagnetic waves as a form of energy that travels through space at the speed of light.