In modern society, radio is the most widely used means of broadcasting and electronic communication. Radio can be broadcast with both microwaves and longer radio waves. These are transmitted in two ways: by amplitude modulation (AM) and by frequency modulation (FM). Amplitude radio is created by combining a sound wave from a microphone, cassette, record or CD with a "carrier" radio wave. The result is a wave that transmits voice or programming as its amplitude (intensity) increases and decreases. Frequency modulation transmits information, voice and music over a radio wave by slightly changing or modulating the frequency. A big advantage of frequency modulation is that it is static-free. AM radio works by changing the amplitude of the carrier wave and FM radio works by changing the frequency of the carrier wave. In amplitude modulation, the amplitude of a carrier wave at a specific frequency. is modified. The antenna emits two types of Am waves: ground waves and sky waves. From the antenna, ground waves propagate horizontally and travel through the air along the Earth's surface. On the other hand, sky waves spread across the sky. When these waves reach the ionosphere, they can be reflected back to Earth. This reflection allows AM radio waves to be received at great distances from the antenna. In this image it is obvious that ground waves do not go very far. This means that multiple stations can be broadcast on the same frequency without interfering with each other, as long as they are far enough apart. The problems noted are that sky waves can be found in other states, provinces or even other countries. FM radio waves also propagate horizontally along the ground and toward the sky. However, due to the higher frequency of the carrier in the middle of the paper strip. Hetrodyning is a method of transferring a broadcast signal from a carrier to a fixed frequency in a receiver, so in most cases it is not necessary to flip the receiver when changing channels/stations on the radio. A superhetrodyne receiver is installed on most modern radios in order to use the heterodyne method. Heterodyning is used with AM and FM radio to ensure a more convenient and efficient experience. There are many differences between AM and FM radio, for example, AM has the capacity to have a greater number of channels but does not have the best quality. FM doesn't have the same capacity in terms of number of channels, but the space between channels is much wider, making the quality much better. Although FM radio is limited to 100 radio channels, this is compensated by the quality of the radio broadcast and is therefore the best option. Lee Wilson