#Absorption emc meaning series#

#Absorption emc meaning series#

Such series of reflections also occurs in a soap film. According to the laws of classical electrodynamics, there emerges a sequence of waves having different amplitudes and phases that are reflected from the structure. A layer of absorbing material is placed on a reflective substrate or is combined with a specially designed anti-reflective coating. In order to absorb incident radiation completely, we need to use interference. However, black paint is a relatively poor absorber - a certain amount of energy from the incident light (typically a few percent) is still reflected back into the surrounding space. It looks black because a significant amount of the light that falls on it is absorbed in the layer of paint and does not reach the observer. Effective absorption of electromagnetic waves is also important for use in sensing, nanochemistry, and photodynamic therapy.Ī classic example of an electromagnetic absorber that is familiar to many people is ordinary black paint. Absorbing materials in the microwave range of frequencies have an application that is equally as important - they are able to reduce the radar visibility of an aircraft.

Electromagnetic energy harvesting in the visible spectrum is very important for photovoltaics - the conversion of solar energy into direct current electricity. Effective absorption of the energy of electromagnetic radiation is the cornerstone of a wide range of practical applications.