Glossary R

The Environmental Glossary. Letter R +++ Popular Articles: 'Range', 'Resource', 'Recycling'

A R rating curve is a drawn curve showing the relation between gage height and Discharge of a stream at a given gaging station.

The R-value or "thermal resistance value" is a measure of the resistance of a material to Heat flow. The term is typically used to describe the resistance properties

A RADIANT HEAT TRANSFER is Radiant Heat Transfer occurs when there is a large difference between the

Deutsch: Strahlung / Español: Radiación / Português: Radiação / Français: Rayonnement / Italiano: Radiazione

In physics, radiation is a process in which energetic particles or energetic waves travel through a vacuum, or through matter-containing media that are not required for their propagation. Waves of a mass filled medium itself, such as water waves or sound waves, are usually not considered to be forms of "radiation" in this sense.

A Radiation: is Radiation is Energy emitted in the form of electromagnetic waves. Radiation has differing characteristics depending upon the wavelength. Because the radiation from the

A Radiative Forcing is a change in the balance between incoming solar radiation and outgoing infrared radiation.

Deutsch: Radioaktivität / Español: Radiactividad / Português: Radioatividade / Français: Radioactivitê ©/ Italiano: Radioattività
Radioactive decay, also known as nuclear decay or radioactivity, is the process by which a nucleus of an unstable atom loses energy by emitting ionizing radiation. A material that spontaneously emits this kind of radiation — which includes the emission of alpha particles, beta particles, gamma rays and conversion electrons — is considered radioactive.

A radioactive waste is the Byproduct of nuclear reactions that gives off (usually harmful) radiation.

A radioactivity is the spontaneous emission of matter or energy from the nucleus of an unstable atom (the emitted matter or energy is usually in the form of alpha or beta particles, gamma rays, or neutrons).

Deutsch: Radionuklid / Español: Radioisótopo / Português: Radioisótopo / Français: Radioisotope / Italiano: Radionuclide

A radioisotope in the environmental context refers to a radioactive isotope of an element that naturally occurs or is artificially produced. These isotopes undergo radioactive decay, emitting radiation in the form of alpha particles, beta particles, or gamma rays. Radioisotopes have both beneficial and potentially harmful impacts on the environment and human health. They are used in a wide range of applications, including medical treatments, power generation, and as tracers in environmental and geological research to study processes such as water movement, soil erosion, and the age of geological formations.

Related Articles

Acid Deposition ■■■■■■■■■■
An Acid Deposition is a complex chemical and atmospheric phenomenon that occurs when Emissions of sulfur . . . Read More
Sulfur dioxide ■■■■■■■■
Sulfur dioxide (SO2) is a heavy, smelly gas which can be condensed into a clear liquidused to make sulfuric . . . Read More
Acid ■■■■■■■■
An Acid is a Corrosive solution with a pH less than 7Description Acid in the environment refers to the . . . Read More
Carbon dioxide ■■■■■■■■
A carbon dioxide (CO2) is a naturally occurring greenhouse gas in the atmosphere, concentrations of which . . . Read More
Emission at top500.de■■■■■■■■
Emission may refer to exhaust gas, flue gas occurring as a result of the combustion of a fuel or the . . . Read More
Criteria air contaminants ■■■■■■■
Criteria air contaminants: Criteria air contaminants (CACs) means Emissions of criteria air contaminants . . . Read More
Greenhouse gas ■■■■■■■
Greenhouse gas: A greenhouse gas is a gas involved in the greenhouse effect. So a Greenhouse Gas is any . . . Read More
Allowance ■■■■■■
Allowance: An allowance is a tradeable permit to emit a specific amount of a pollutant. For example, . . . Read More
Absorber at top500.de■■■■■■
Absorber: In the industrial context, an absorber is a device or system used to remove or absorb a particular . . . Read More
Atmosphere ■■■■■■
An atmosphere is the 500 km thick Layer of air surrounding the earth which supports the existence of . . . Read More