Source: Wikipedia. 1981) ist Chefredakteur des Online-Satireportals Postillion. {\displaystyle p} The temperature of stars other than the Sun can be approximated using a similar means by treating the emitted energy as a black body radiation. The luminosity of the Sun, Lâ, is given by: At Earth, this energy is passing through a sphere with a radius of a0, the distance between the Earth and the Sun, and the irradiance (received power per unit area) is given by. A T is the power radiated by a surface of area A through a solid angle dΩ in the frequency range between ν and ν + dν. we obtain the following expression, after dividing by Harte Kritik von Seiten der Wiftung musste auch der Chefredakteur der Zeitung, Stefan Sichermann [Name geändert, Anm. Nach dem Studium Lehramt für Englisch und Geschichte für das Gymnasium arbeitete Sichermann zunächst in Hamburg bei einer Werbeagentur als Werbetexter, ehe er sich 2011 selbständig machte und nach Fürth zog; zuvor hatte er 2008 bereits das Online-Satiremagazin gegründet. Chapter 1: Historical overview of climate change science, Solar Radiation and the Earth's Energy Balance, "Derivation of the StefanâBoltzmann Law", https://en.wikipedia.org/w/index.php?title=StefanâBoltzmann_law&oldid=990090647, ÐелаÑÑÑÐºÐ°Ñ (ÑаÑаÑкевÑÑа)â, Srpskohrvatski / ÑÑпÑкоÑ
ÑваÑÑки, Creative Commons Attribution-ShareAlike License, This page was last edited on 22 November 2020, at 19:27. The radiant flux (i.e. ν Stefan Begleiter ngày 6 tháng 4 năm 1925 Schlossergehilfe 1 6 Ju. Stefan Sichermann (geb. Der Spiegel - Wikipedia. , giving the result that, for a perfect blackbody surface: Finally, this proof started out only considering a small flat surface. V {\displaystyle T} This derivation uses spherical coordinates, with θ as the zenith angle and Ï as the azimuthal angle; and the small flat blackbody surface lies on the xy-plane, where θ = Ï/2. Der Blog rund um deine Finanzen in Ausbildung und Studium. In the above discussion, we have assumed that the whole surface of the earth is at one temperature. German Vice-chancellor Sigmar Gabriel declared at the recent SPD party Congress that the party must support data retention legislation in parliament or he’ll drown the kitten. This relation is: Now, from the fundamental thermodynamic relation. {\displaystyle 6\zeta (4)={\frac {\pi ^{4}}{15}}} Goslar (Archiv) - Eine hochbetagte Hobby-Architektin erregt derzeit mit einem einzigartigen Projekt Aufsehen: Die Seniorin gewann den renommierten "Architektur-Preis für nachhaltigen Hausbau" – mit einem Wohnhaus, das sie aus komplett essbaren Rohstoffen konstruiert hat. This same formula can be used to compute the approximate radius of a main sequence star relative to the sun: where π Ω [13] So: where L is the luminosity, Ï is the StefanâBoltzmann constant, R is the stellar radius and T is the effective temperature. {\displaystyle \left({\frac {\partial u}{\partial T}}\right)_{V}} Startseite; About; Finanzierung. {\displaystyle \int _{0}^{\pi /2}\cos \theta \sin \theta \,d\theta } However, any differentiable surface can be approximated by a collection of small flat surfaces. 2 . Der Postillon is a German website, run by Stefan Sichermann featuring satirical articles reporting on international, national, and local news in newspaper and TV format.In October 2015, the Postillon had more than 14 million visitors. λ This of course depends on the angle of the sun on the surface and on how much air the sunlight has gone through. The law is also met in the thermodynamics of black holes in so-called Hawking radiation. θ To find the total power radiated from an object, multiply by its surface area, ( The first edition was held in 2001 with female competitors in six age-groups from 35 and male competitors in seven age-groups from 40. ⊕ ε Der Spiegel is a German weekly news magazine published in Hamburg. Another interesting question is to ask what the temperature of a blackbody surface on the earth would be assuming that it reaches equilibrium with the sunlight falling on it. θ Fr. Stefan Sichermann alias "Der Postillon" macht die erfolgreichste Mediensatire im Netz. π 1. A The integral on the right is standard and goes by many names: it is a particular case of a BoseâEinstein integral, the polylogarithm, or the Riemann zeta function [6] ⊙ The law can be derived by considering a small flat black body surface radiating out into a half-sphere. 77027 Isak Silber 1924-1-10 Schlosser 2 375 Ju. [17][18] This derivation uses the relation between the radiation pressure p and the internal energy density German website, run by Stefan Sichermann featuring satirical articles reporting on international, national, and local news in newspaper and TV format. To derive the StefanâBoltzmann law, we must integrate dΩ = sin(θ) dθ dÏ over the half-sphere and integrate ν from 0 to â. April 2020 um 10:18, https://www.fuerthwiki.de/wiki/index.php?title=Stefan_Sichermann&oldid=298741, ''Creative Commons'' „Namensnennung – Weitergabe unter gleichen Bedingungen“, 2010: Deutsche Welle Auszeichnung "The BOBs" als "Best Weblog German", 2013: Grimme Online Award im Bereich Information. In October 2015, the Postillon had more than 14 million visitors. Listen to the collection here.
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