Oak Forest Health Center Pharmacy Of Cook County practices as a Clinic Pharmacy provider in Oak Forest, Illinois. Find their office location, ratings, phone number, NPI, and more. Home
Artwork: How radio waves travel from a transmitter to a receiver. 1) Electrons rush up and down the transmitter, shooting out radio waves. 2) The radio waves travel through the air at the speed of light. 3) When the radio waves hit a receiver, they make electrons vibrate inside it, recreating the original signal.
The propagation speed of radio waves in free space is equal to the speed of light in a vacuum: c = 300,000 km/sec. When a radio wave propagates in a material medium such as the atmosphere, the upper layer of the earth, or seawater, its phase velocity is changed, and energy is absorbed.