The electromagnetic spectrum is a linear construct, designed to show the levels of energy that exist in the universe. All around us is a constant stream of energy. Today s radio emissions, television, public and private communications, reach us no matter where we are. There is solar radiation that never stops.
Sound waves reach our ears by way of cricket or car, the country or the city.
Then of course, there is gravity. Almost inexplicable, helping us to stay on earth while it spins at 1000 miles per hour and keeping the earth circling around the Sun rather than spin off into space. Magnetism abounds, from refrigerator magnets to electric motors. The earth itself is magnetic. Just ask any Boy Scout with his trusted compass.