Lecture on Electromagnetic Spectrum

Electromagnetic waves come in many wavelengths and frequencies. Each one is useful in different ways. The electromagnetic spectrum is the range of all EM frequencies. The EM spectrum is a smooth, gradual progression from the lowest frequencies to the highest (and wavelengths). Radio waves are broadcasted by a transmitter where a receiver picks up the signals and converts it to sound waves. Radio stations use different frequencies so they don’t get crossed.