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The color temperature scale describes only the color of light emitted by a light source, which may actually be at a different (and often much lower) temperature. [1] [2] Color temperature has applications in lighting, [3] photography, [4] videography, [5] publishing, [6] manufacturing, [7] astrophysics, [8] and other fields.
Blue hour at the Old Cathedral of the Holy Name of Jesus, Bragança in Portugal. The blue hour (from French l'heure bleue; [1] [a] pronounced [lœʁ blø]) is the period of twilight (in the morning or evening, around the nautical stage) when the Sun is at a significant depth below the horizon. During this time, the remaining sunlight takes on a ...
Coldest: Decatur, Alabama. The northern part of the state holds the city with the lowest average temperature: Decatur. It gets down to an average of only 50 degrees during the year.
[3] [6] Beyond 18 degrees, refracted sunlight is no longer visible. [6] True night is defined as the period when the sun is 18 or more degrees below either horizon. [4] Since the atmosphere refracts sunlight, polar day is longer than polar night, and the area that experiences polar night is slightly smaller than the area that experiences polar day.
Citing 75 degrees as the ideal evening temperature for dining, the study sought the days least likely to produce rain in each state when the temperature was also perfect. Here's what you need to know:
Civil dawn begins when there is enough light for most objects to be distinguishable, so that some outdoor activities can commence. It occurs when the center of the Sun is 6 degrees below the horizon in the morning. [5] When the sky is clear, it is blue colored, and if there are clouds or haze, bronze, orange and yellow colors are seen.
Third degree: Muscles, tendons, nerves and blood vessels freeze. Fourth degree: Pain lasts for more than a few hours and skin may turn dark blue or black; gangrene is a real threat and will ...
Since the axial tilt of Earth is considerable (23 degrees, 26 minutes, 21.41196 seconds), at high latitudes the Sun does not set in summer; [8] rather, it remains continuously visible for one day during the summer solstice at the polar circle, for several weeks only 100 km (62 mi) closer to the pole, and for six months at the pole. At extreme ...