What are radio waves, microwaves, and infrared waves used to do?

Radio waves are used to transmit radio waves and terrestrial TV signals (TV received through an aerial). Radio waves have these uses because they can travel long distances before being absorbed e.g. by buildings and trees. Longer wavelength radio waves can also spread out between trees. Additionally, radio waves reflect off the ionosphere, which is a layer of charged particles in the atmosphere. And this allows radio waves to be sent from very long distances around the earth. Microwaves are used to heat food. This is because most foods contain a lot of water molecules and water molecules absorb the energy of microwaves. This energy then allows the temperate of the food to increase. Microwaves are also used to communicate with satellites in space. This is because microwaves can pass through the earth’s atmosphere without being reflected or refracted. Infrared waves are used to cook food in ovens and are emitted by electrical heaters. Infrared waves have these uses because the energy of Infrared is easily absorbed by the surface of objects e.g. the infrared from a heater is absorbed by objects in the room, making the room warmer. Infrared is also used in Infrared cameras e.g. to check buildings for heat losses.