That selective absorber is thermally coupled to a selective emitter, which then thermally radiates electromagnetic radiation.
All bodies radiate electromagnetic energy as heat; in fact, a body emits radiation at all wavelengths.
A hearing loop, installed around the periphery of a room, is a thin copper wire that radiates electromagnetic signals.
For low radio frequencies, terrestrial antennas radiate electromagnetic waves that travel along the surface of the Earth as if in a waveguide.
Similarly, when the nucleus of an atom radiates electromagnetic energy in the form of a wave packet known as a gamma-ray photon it is also subject to the Doppler shift.
Electromagnetic compatibility (EMC) issues have become much more significant now that there are a large number of electronic devices which unintentionally radiate electromagnetic energy in the same frequency ranges used for communication, navigation, and instrumentation.
In addition to mandatory requirements that concern the communication qualities of radio equipment, there are also regulations which aim to limit interference from any equipment that radiates electromagnetic waves, intentionally or not.
Just as radio frequency and microwave antenna technologies have enabled countless unprecedented applications (cellular and satellite communications, radar and biomedical imaging, among others), the ability to radiate electromagnetic fields within a chip in a controlled manner would allow us to overcome the aforementioned limitations and open doors to a wide range of new functionalities.
But that turning will also cause the electron to radiate electromagnetic waves, much as a wet dishcloth will fling off drops of water if you whirl it above your head.
Light-weight EMI shielding is needed to protect the environment and workplace from EMI due to unwanted electromagnetic waves, especially for the building containing power transformers and other electronic facilities, which will radiate electromagnetic wave to the environment.
