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le samedi 20 octobre 2018, à 02:41. Posté par Carmelo

Gloomy tales http://www.emtronics.co.uk/wp_blog/index.php/24hreupin-02c3.pdf#pigs ukonlinepharmacy.com If you look closely at any shadow cast by the sun, say the one cast by your hand on a piece of paper, you will notice that the edge of the shadow isn't sharp. That's because the sun is not a point source of light. It is a disk, so the shadows it casts are slightly fuzzy. The solid dark part of the shadow is called the "umbra" (Latin for "shade"). The fuzziness along the shadow's edge is called the "penumbra" (Latin for "almost shade").

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