ideal black
61Color temperature — The CIE 1931 x,y chromaticity space, also showing the chromaticities of black body light sources of various temperatures (Planckian locus), and lines of constant correlated color temperature. Color temperature is a characteristic of visible light …
62Luminous efficacy — is a measure of how well a light source produces visible light. It is the ratio of luminous flux to power. Depending on context, the power can be either the radiant flux of the source s output, or it can be the total electric power consumed by… …
63Holstein (cattle) — The Holstein or Friesian is a breed of dairy cow known today as the world s highest production dairy animal. Originating in Europe, Holsteins were developed in what is now the Netherlands and more specifically in the two northern provinces of… …
64Stefan–Boltzmann law — The Stefan–Boltzmann law, also known as Stefan s law, states that the total energy radiated per unit surface area of a black body in unit time (known variously as the black body irradiance, energy flux density, radiant flux, or the emissive… …
65Optical properties of carbon nanotubes — Contents 1 Terminology 2 Electronic structure of carbon nanotube 3 Van Hove singularities …
66Emissivity — The emissivity of a material (usually written ε or e) is the relative ability of its surface to emit energy by radiation. It is the ratio of energy radiated by a particular material to energy radiated by a black body at the same temperature. A… …
67Java (chicken) — Infobox Chickenbreed name = Java imagecaption = The illustration of the ideal Black Java female in the 1905 Standard of Perfection. status = Critical altname = country = U.S. nickname = apa = yes apagroup = American aba = abagroup = extinct =… …
68Radiance — For other uses, see Radiance (disambiguation). Radiance and spectral radiance are radiometric measures that describe the amount of radiation such as light or radiant heat that passes through or is emitted from a particular area, and falls within… …
69Ultraviolet catastrophe — The ultraviolet catastrophe, also called the Rayleigh Jeans catastrophe, was a prediction of early 20th century classical physics that an ideal black body at thermal equilibrium will emit radiation with infinite power.The term ultraviolet… …
70Joseph Stefan — Infobox Scientist box width = 300px name = Joseph Stefan image size = 250px caption = Jožef Stefan (1835 1893) birth date = birth date|1835|3|24|df=y birth place = St Peter near Klagenfurt, Austrian Empire death date = death date and… …
