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2. Windshield sun shade - Wikipedia

   en.wikipedia.org/wiki/Windshield_sun_shade

   There are several variants of car sun shade types. Typically, sun shields are made of a layer of mylar or aluminum foil which covers the inside of the car's windows, to reflect the sun's rays away, and preventing the interior from being exposed to those rays. There are sunshades specifically designed to fit the inside of the front windshield of ...

3. Awning - Wikipedia

   en.wikipedia.org/wiki/Awning

   Restaurants often use awnings broad enough to cover substantial outdoor area for outdoor dining, parties, or reception. In commercial buildings, an awning is often painted with information as to the name, business, and address, thus acting as a sign or billboard as well as providing shade, breaking strong winds, and protecting from rain or snow ...

4. Shade sail - Wikipedia

   en.wikipedia.org/wiki/Shade_sail

   Shade sail over playground in Australia. A shade sail − or somewhat more precise a textile sunshade sail or a textile sun protection sail − is a device to create outdoor shade based on the textile basic technology that can be found in a ship's sail. [1] Shade sails use a flexible membrane tensioned between several anchor points. While ...

5. Umbra, penumbra and antumbra - Wikipedia

   en.wikipedia.org/wiki/Umbra,_penumbra_and_antumbra

   The Earth’s shadow has two distinct parts,… the UMBRA is the part of the shadow where all direct sunlight is blocked by the Earth; the PENUMBRA of the shadow is where the Earth only blocks some of the sunlight.” Umbra (A) and penumbra (B)