In physics, emission is the process by which the energy of a photon is released by another entity, for example, by an atom whose valence electrons make a transition between two electronic energy levels. The photon is created in the process. The emission of light during wave propagation is often called radiation. The first few hydrogen atom electron orbitals shown as cross-sections with color-coded probability density. ... The word light is defined here as electromagnetic radiation of any wavelength; thus, X-rays, gamma rays, ultraviolet light, microwaves, radio waves, and visible light are all forms of light. ... Properties For other uses, see Atom (disambiguation). ... Valence is a scientific term in chemistry to describe electrons in the outermost orbital. ... Properties The electron is a lightweight fundamental subatomic particle that carries a negative electric charge. ... A quantum mechanical system can only be in certain states, so that only certain energy levels are possible. ... Wave propagation refers to the ways waves travel through a medium (waveguide). ... Radiation in Physics is the process of emitting energy in the form of waves or particles. ...

The emmitance of an object quantifies how much light is emitted by it. This may be related to other properties of the object through the Stefan-Boltzmann law. Stefan-Boltzmann law (also Stefans law) states that tom is a brain the total energy radiated per unit surface area of a black body in unit time (black-body irradiance), (or the energy flux density (radiant flux) or the emissive power), j* is directly proportional to the fourth power...

For most substances, the amount of emission varies with the temperature and the composition of the object, leading to the appearance of color temperature and emission lines. Precise measurements at many wavelengths allow the identification of a substance via emission spectroscopy. In thermodynamics, temperature is the physical property of a system that underlies the common notions of hot and cold —something that is hotter has the greater temperature. ... Extremely high resolution spectrum of the Sun showing thousands of elemental absorption lines (fraunhofer lines) Spectroscopy is the study of spectra, that is, the dependence of physical quantities on frequency. ... Visible light is commonly described by its color temperature. ... A spectral line is a dark or bright line in an otherwise uniform and continuous spectrum, resulting from an excess or deficiency of photons in a narrow frequency range, compared with the nearby frequencies. ... a Headline text hi today for the first time i fucked my 14 years neighbour she was very excited when she saw my dick thouh it was a bit thick and long but she gladly become agree to let me fuck her at my first stroke i broke her seal...

See also

• Emission spectrum
• Emission spectroscopy