Electromagnetic waves are members of a family of waves with common properties called the electromagnetic spectrum. The electromagnetic spectrum is a continuous range of wavelengths. The types of ...

F OR SOLDIERS at the front, electromagnetic defences are as vital as air: invisible when present, and disastrous when not. In ...

Radiation within the visible spectrum can appear black if it is low in power – more specifically, lower in power than its ...

Shorter wavelength energy includes ultraviolet, X-ray and gamma radiation ... photons anywhere in the electromagnetic spectrum can be seen as black. Or in some cases, they can’t be seen at ...

THz waves, located in the far-infrared region of the electromagnetic spectrum, can be used to perform non-invasive imaging through opaque materials for security and quality control applications.

Researchers from Tokyo Metropolitan University have developed a new dye that can strongly absorb second near-IR radiation and transform it to heat. Starting with a dye from the bile pigment family, ...