Any material that absorbs at least 50% of the sound energy that strikes it. The NRC is a measure of a sound absorber performance.
The part of the collector that actively absorbs the light rays. For solar tubes this is defined as the cross-sectional area of the inner tube (selective coated) measured using the outside diameter. (Eg. 0.047 x 1.72m = 0.08m) This value is used when calculating efficiency values. For solar tube collectors with reflective panels, the entire circumferential surface area of the inner tube is often used when calculating absorber area, as the reflective panel is supposed to reflect light onto underside of the evacuated tube. The Apricus AP solar collector does not use reflective panels, learn why by clicking here.
(physics) material in a nuclear reactor that absorbs radiation
The blackened surface in a collector that absorbs the solar radiation and converts it to heat energy.
Any material that stops ionizing radiation. Lead, concrete, and steel attenuate gamma rays. A thin sheet of paper or metal will stop or absorb alpha particles and most beta particles.
A material which absorbs electromagnetic energy by converting the wave energy into heat.
The heat absorber is the part of the solar collector which receives radiant energy from the sun and transforms it into thermal energy. It is usually made of metal that is coated with a heat-absorbing material.
The component of a solar thermal collector that absorbs solar radiation and converts it to heat, or, as in a solar photovoltaic device, the material that readily absorbs photons to generate charge carriers (free electrons or holes).
In high energy physics experiments, an absorber is a block of material used to absorb some of the energy of an incident particle. Absorbers can be made of a variety of materials, depending on the purpose; lead and liquid hydrogen are common choices.