44 relations: Absolute scale, Absolute zero, Astronomy, Black body, Boltzmann constant, Celsius, Color temperature, Conversion of units of temperature, Degree (temperature), Effective temperature, Fahrenheit, Friis formulas for noise, General Conference on Weights and Measures, Halfwidth and fullwidth forms, Hertzsprung–Russell diagram, International Bureau of Weights and Measures, International Committee for Weights and Measures, International System of Units, International Temperature Scale of 1990, Johnson–Nyquist noise, Kinetic theory of gases, Negative temperature, Noise (electronics), Noise floor, Noise temperature, Noun adjunct, Ohm, Photography, Proposed redefinition of SI base units, Rankine scale, Scale of temperature, SI base unit, Stellar classification, Sun, Temperature, Thermodynamic temperature, Thermodynamics, Triple point, Unicode, Unicode compatibility characters, University of Glasgow, Vienna Standard Mean Ocean Water, Volt, William Thomson, 1st Baron Kelvin.
An absolute scale is a system of measurement that begins at a minimum, or zero point, and progresses in only one direction.
Absolute zero is the lower limit of the thermodynamic temperature scale, a state at which the enthalpy and entropy of a cooled ideal gas reach their minimum value, taken as 0.
Astronomy (from ἀστρονομία) is a natural science that studies celestial objects and phenomena.
A black body is an idealized physical body that absorbs all incident electromagnetic radiation, regardless of frequency or angle of incidence.
The Boltzmann constant, which is named after Ludwig Boltzmann, is a physical constant relating the average kinetic energy of particles in a gas with the temperature of the gas.
The Celsius scale, previously known as the centigrade scale, is a temperature scale used by the International System of Units (SI).
The color temperature of a light source is the temperature of an ideal black-body radiator that radiates light of a color comparable to that of the light source.
This is a compendium of temperature conversion formulas and comparisons among eight different temperature scales, several of which have long been obsolete.
The term degree is used in several scales of temperature.
The effective temperature of a body such as a star or planet is the temperature of a black body that would emit the same total amount of electromagnetic radiation.
The Fahrenheit scale is a temperature scale based on one proposed in 1724 by Dutch-German-Polish physicist Daniel Gabriel Fahrenheit (1686–1736).
Friis formula or Friis's formula (sometimes Friis' formula), named after Danish-American electrical engineer Harald T. Friis, refers to either of two formulas used in telecommunications engineering to calculate the signal-to-noise ratio of a multistage amplifier.
The General Conference on Weights and Measures (Conférence générale des poids et mesures – CGPM) is the supreme authority of the International Bureau of Weights and Measures (Bureau international des poids et mesures – BIPM), the inter-governmental organization established in 1875 under the terms of the Metre Convention (Convention du Mètre) through which Member States act together on matters related to measurement science and measurement standards.
In CJK (Chinese, Japanese and Korean) computing, graphic characters are traditionally classed into fullwidth (in Taiwan and Hong Kong: 全形; in CJK: 全角) and halfwidth (in Taiwan and Hong Kong: 半形; in CJK: 半角) characters.
The Hertzsprung–Russell diagram, abbreviated H–R diagram, HR diagram or HRD, is a scatter plot of stars showing the relationship between the stars' absolute magnitudes or luminosities versus their stellar classifications or effective temperatures.
The International Bureau of Weights and Measures (Bureau international des poids et mesures) is an intergovernmental organization established by the Metre Convention, through which Member States act together on matters related to measurement science and measurement standards.
The International Committee for Weights and Measures (abbreviated CIPM from the French Comité international des poids et mesures) consists of eighteen persons, each of a different nationality, from Member States of the Metre Convention (Convention du Mètre) appointed by the General Conference on Weights and Measures (CGPM) whose principal task is to promote worldwide uniformity in units of measurement by taking direct action or by submitting proposals to the CGPM.
The International System of Units (SI, abbreviated from the French Système international (d'unités)) is the modern form of the metric system, and is the most widely used system of measurement.
The International Temperature Scale of 1990 (ITS-90) published by the Consultative Committee for Thermometry (CCT) of the International Committee for Weights and Measures (CIPM) is an equipment calibration standard for making measurements on the Kelvin and Celsius temperature scales.
Johnson–Nyquist noise (thermal noise, Johnson noise, or Nyquist noise) is the electronic noise generated by the thermal agitation of the charge carriers (usually the electrons) inside an electrical conductor at equilibrium, which happens regardless of any applied voltage.
The kinetic theory describes a gas as a large number of submicroscopic particles (atoms or molecules), all of which are in constant rapid motion that has randomness arising from their many collisions with each other and with the walls of the container.
In physics, certain systems can achieve negative temperature; that is, their thermodynamic temperature can be expressed as a negative quantity on the Kelvin or Rankine scales.
In electronics, noise is an unwanted disturbance in an electrical signal.
In signal theory, the noise floor is the measure of the signal created from the sum of all the noise sources and unwanted signals within a measurement system, where noise is defined as any signal other than the one being monitored.
In electronics, noise temperature is one way of expressing the level of available noise power introduced by a component or source.
In grammar, a noun adjunct or attributive noun or noun (pre)modifier is an optional noun that modifies another noun; it is a noun functioning as a pre-modifier in a noun phrase.
The ohm (symbol: Ω) is the SI derived unit of electrical resistance, named after German physicist Georg Simon Ohm.
Photography is the science, art, application and practice of creating durable images by recording light or other electromagnetic radiation, either electronically by means of an image sensor, or chemically by means of a light-sensitive material such as photographic film.
The International Committee for Weights and Measures (CIPM) has proposed revised definitions of the SI base units, for consideration at the 26th General Conference on Weights and Measures (CGPM).
The Rankine scale is an absolute scale of thermodynamic temperature named after the Glasgow University engineer and physicist William John Macquorn Rankine, who proposed it in 1859.
Scale of temperature is a way to measure temperature quantitatively.
The International System of Units (SI) defines seven units of measure as a basic set from which all other SI units can be derived.
In astronomy, stellar classification is the classification of stars based on their spectral characteristics.
The Sun is the star at the center of the Solar System.
Temperature is a physical quantity expressing hot and cold.
Thermodynamic temperature is the absolute measure of temperature and is one of the principal parameters of thermodynamics.
Thermodynamics is the branch of physics concerned with heat and temperature and their relation to energy and work.
In thermodynamics, the triple point of a substance is the temperature and pressure at which the three phases (gas, liquid, and solid) of that substance coexist in thermodynamic equilibrium.
Unicode is a computing industry standard for the consistent encoding, representation, and handling of text expressed in most of the world's writing systems.
In Unicode and the UCS, a compatibility character is a character that is encoded solely to maintain round trip convertibility with other, often older, standards.
The University of Glasgow (Oilthigh Ghlaschu; Universitas Glasguensis; abbreviated as Glas. in post-nominals) is the fourth-oldest university in the English-speaking world and one of Scotland's four ancient universities.
Vienna Standard Mean Ocean Water (VSMOW) is a water standard defining the isotopic composition of fresh water.
The volt (symbol: V) is the derived unit for electric potential, electric potential difference (voltage), and electromotive force.
William Thomson, 1st Baron Kelvin, (26 June 1824 – 17 December 1907) was a Scots-Irish mathematical physicist and engineer who was born in Belfast in 1824.
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