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  2. Crookes radiometer - Wikipedia

    en.wikipedia.org/wiki/Crookes_radiometer

    The white or silver side of the vanes are slightly warmer than the internal air temperature but cooler than the black side, as some heat conducts through the vane from the black side. The two sides of each vane must be thermally insulated to some degree so that the polished or white side does not immediately reach the temperature of the black side.

  3. Black Sun (symbol) - Wikipedia

    en.wikipedia.org/wiki/Black_Sun_(symbol)

    A leather belt with the black sun symbol as belt buckle. The item is from the 2010s. In the late 20th century, the Black Sun symbol became widely used by neo-fascist, neo-Nazi, [8] the far-right and white nationalists. The symbol often appears on extremist flags, t-shirts, posters, websites and in extremist publications associated with such groups.

  4. Solar symbol - Wikipedia

    en.wikipedia.org/wiki/Solar_symbol

    U+2609 ☉ SUN; U+2600 ☀ BLACK SUN WITH RAYS (A more accurate term might be "solid colour". The actual colour is an implementation choice, for example ☀, ☀.) U+263C ☼ WHITE SUN WITH RAYS (A more accurate term might be "outlined". The actual colour is an implementation choice.)

  5. Sunbaker - Wikipedia

    en.wikipedia.org/wiki/Sunbaker

    Sunbaker is a 1937 black-and-white photograph by Australian modernist photographer Max Dupain.It depicts the head and shoulders of a man lying on a beach in New South Wales, taken from a low angle.

  6. Suns in alchemy - Wikipedia

    en.wikipedia.org/wiki/Suns_in_alchemy

    The black sun as pictured in the Putrifaction emblem of Philosophia Reformata (Johann Daniel Mylius) Sol niger (black sun) can refer to the first stage of the alchemical magnum opus, the nigredo (blackness). In a text ascribed to Marsilio Ficino three suns are described: black, white, and red, corresponding to the three most used alchemical ...

  7. AOL Mail

    mail.aol.com

    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  8. Albedo - Wikipedia

    en.wikipedia.org/wiki/Albedo

    These factors vary with atmospheric composition, geographic location, and time (see position of the Sun). While directional-hemispherical reflectance factor is calculated for a single angle of incidence (i.e., for a given position of the Sun), albedo is the directional integration of reflectance over all solar angles in a given period. The ...

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