These technologies are used extensively in day to day applications.
Infrared heating is done by using lamps which are designed to emit energy in the infrared spectrum.
It is light of simply a different wavelength which can be used to heat and cure materials below it. Radio-frequency heating uses radio waves to heat and dry products. The radio waves are concentrated on a product containing water. A large depth of penetration is possible with radio-frequency and as the water evaporates there is nothing to absorb the RF energy, but the product is not damaged through overdrying. Ultraviolet occurs at wavelengths shorter than visible light spectrum.