Electromagnetic waves and black body radiation GapFill

Electromagnetic waves are transverse waves in electric and magnetic fields. Electromagnetic waves can have a variety of wavelengths and frequencies, forming a continuous spectrum.
The regions of the electromagnetic spectrum with some applications, from longest to shortest wavelength, are:

• radio waves - television and radio broadcasts
•  ultravioletinfraredradio wavesgamma raysvisible lightmicrowaves - satellite communications, cooking food
•  radio wavesinfraredvisible lightgamma raysmicrowavesultraviolet - electrical heaters, cooking food, thermal cameras
• visible light -  cooking foodmedical imaging and treatmentsheatingfibre-optic communicationsWi-Fisatellite communications
•  visible lightultravioletmicrowavesradio wavesgamma raysinfrared - hospital sterilisation, suntanning
• X-rays and gamma rays -  heatingWi-Fisatellite communicationsfibre-optic communicationscooking foodmedical imaging and treatments

Gamma waves are produced by  rotating atomschanges in nucleichanging magnetic fieldshot objectselectrons moving between orbitalsoscillations in electrical currents.

When light moves from one material into another, it can change direction due to the change in speed of the light; this is called  diffractionpolarisationrefractionabsorptionreflectiontransmission and is used in lenses.