AM (Amplitude Modulation) and FM (Frequency Modulation) are two types of radio waves that are used for broadcasting. AM waves are created by varying the amplitude of the radio wave, while FM waves are created by varying the frequency of the radio wave.
AM waves are typically used for broadcasting over long distances, while FM waves are typically used for broadcasting over shorter distances. AM waves can be affected by electrical interference, such as from power lines and lightning, while FM waves are less affected by interference.
AM radio receivers are typically less expensive than FM radio receivers, but FM radio receivers provide better sound quality.