Different changes in energy level need different frequencies of electromagnetic radiation. The absorption of radiation can be analysed by an ‘absorption spectrum’. The different black lines ...

However, the needed thickness for a transparent material to provide that absorption was unknown ... to block certain types of harmful electromagnetic radiation while letting others like GPS ...

with Dr Maggie Aderin-Pocock and Dr Alex Lathbridge. The video investigates emissions of infrared radiation and then absorption.

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, ...

All biological tissue is, to differing extents, permeable to electromagnetic (EM) radiation of different frequencies and ... which defines a linear relationship between absorption of EM radiation and ...

This radiation, which is absorbed by the human body, is measured by the Specific Absorption Rate (SAR) index. The SAR value indicates how much electromagnetic radiation is absorbed by the body ...