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Sun specs (also sunspecs) is the shortened form of sun spectacles. Sunglass a monocle version. [citation needed] Sun-shades can also refer to the sun-shading eyepiece-type, although the term is not exclusive to these. Also in use is the derivative abbreviation, "shades". Dark glasses (also preceded by pair of) — generic term in common usage.
Lāhainā Noon, also known as a zero shadow day, is a semi-annual tropical solar phenomenon when the Sun culminates at the zenith at solar noon, passing directly overhead. [1] As a result, the sun's rays will fall exactly vertical relative to an object on the ground and cast no observable shadow . [ 2 ]
The solar zenith angle is the zenith angle of the sun, i.e., the angle between the sun’s rays and the vertical direction.It is the complement to the solar altitude or solar elevation, which is the altitude angle or elevation angle between the sun’s rays and a horizontal plane.
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 ...
Obelisk of Pharao Psamtik II, now called "Obelisk of Montecitorio", used as a Roman sundial, the famous Horologium Augusti, in Rome. In the background is the Italian Chamber of Deputies building [5] In 10 BCE, Emperor Augustus ordered this and the Flaminio Obelisk to be brought to Rome. [6]
The solar azimuth angle is the azimuth (horizontal angle with respect to north) of the Sun's position. [1] [2] [3] This horizontal coordinate defines the Sun's relative direction along the local horizon, whereas the solar zenith angle (or its complementary angle solar elevation) defines the Sun's apparent altitude.
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