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Photon energy can be expressed using any energy unit. Among the units commonly used to denote photon energy are the electronvolt (eV) and the joule (as well as its multiples, such as the microjoule). As one joule equals 6.24 × 10 18 eV, the larger units may be more useful in denoting the energy of photons with higher frequency and higher ...
The einstein (symbol E) is an obsolete unit with two conflicting definitions. It was originally defined as the energy in one mole of photons (6.022 × 10 23 photons). [1] [2] Because energy is inversely proportional to wavelength, the unit is frequency dependent. This unit is not part of the International System of Units (SI) and is redundant ...
In the case that the photon has mass, the mass term 1 / 2 m 2 A μ A μ would affect the galactic plasma. The fact that no such effects are seen implies an upper bound on the photon mass of m < 3 × 10 −27 eV/c 2. [37] The galactic vector potential can also be probed directly by measuring the torque exerted on a magnetized ring. [38]
An amount of light more typical in everyday experience (though much larger than the smallest amount perceivable by the human eye) is the energy of one mole of photons; its energy can be computed by multiplying the photon energy by the Avogadro constant, N A = 6.022 140 76 × 10 23 mol −1, [37] with the result of 216 kJ, about equal to the ...
The alttype field allows conversion between units of different type, provided each unit is whitelisted to allow the conversion. As at December 2013, the following energy units have alttype = "torque" (the first line consists of different units, while the second line consists of aliases for units in the first line):
Template will not display the string "Table X. " in front of the table's title "SI photon units". 1 = <number> The template will display the table number as part of the table header in the following form: "Table <number>. SI photon units.", where <number> is a placeholder for the number (or other table designation) given as parameter.
Total mass–energy of our galaxy, the Milky Way, including dark matter and dark energy [342] [343] 1.4×10 59 J Mass-energy of the Andromeda galaxy (M31), ~0.8 trillion solar masses. [344] [345] 10 62 1–2×10 62 J: Total mass–energy of the Virgo Supercluster including dark matter, the Supercluster which contains the Milky Way [346] 10 70: ...
The first molar ionization energy applies to the neutral atoms. The second, third, etc., molar ionization energy applies to the further removal of an electron from a singly, doubly, etc., charged ion. For ionization energies measured in the unit eV, see Ionization energies of the elements (data page). All data from rutherfordium onwards is ...