This document provides an overview of electromagnetic waves physics: 1) Electromagnetic waves consist of oscillating electric and magnetic fields that propagate perpendicular to each other at the speed of light. 2) Radio antennas generate oscillating electric fields that produce electromagnetic waves, allowing transmission and reception of radio signals. 3) The electromagnetic spectrum encompasses all types of electromagnetic waves including light, radio waves, microwaves, x-rays, which only differ in their wavelength and frequency. 4) Maxwell's equations unified electric and magnetic phenomena and predicted the existence of electromagnetic waves traveling at the speed of light.