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In the past, the term "electro-radiant energy" has also been used. [4] The term "radiant energy" also applies to gravitational radiation. [5] [6] For example, the first gravitational waves ever observed were produced by a black hole collision that emitted about 5.3 × 10 47 joules of gravitational-wave energy. [7]
The energy in electromagnetic waves is sometimes called radiant energy. ... Since such radiation can severely damage life at energy levels that produce little heating ...
The human equivalent assists understanding of energy flows in physical and biological systems by expressing energy units in human terms: it provides a "feel" for the use of a given amount of energy. [9] Sunlight's radiant energy is also captured by plants as chemical potential energy in photosynthesis, when carbon dioxide and water (two low ...
The kinetic energy of particles of non-ionizing radiation is too small to produce charged ions when passing through matter. For non-ionizing electromagnetic radiation (see types below), the associated particles (photons) have only sufficient energy to change the rotational, vibrational or electronic valence configurations of molecules and atoms.
The electromagnetic waves in each of these bands have different characteristics, such as how they are produced, how they interact with matter, and their practical applications. Radio waves, at the low-frequency end of the spectrum, have the lowest photon energy and the longest wavelengths—thousands of kilometers, or more.
Solar energy is the radiant energy from the Sun's light and heat, ... A variety of fuels can be produced by artificial photosynthesis. ...
In a practical, room-temperature setting, humans lose considerable energy due to infrared thermal radiation in addition to that lost by conduction to air (aided by concurrent convection, or other air movement like drafts). The heat energy lost is partially regained by absorbing heat radiation from walls or other surroundings.
The energy flux (irradiance) of a plane wave is calculated using the Poynting vector =, which is the cross product of the electric field vector E and the magnetic field's auxiliary field vector (or magnetizing field) H.