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The spectrum of the Sun's solar radiation can be compared to that of a black body [11] [12] with a temperature of about 5,800 K [13] (see graph). The Sun emits EM radiation across most of the electromagnetic spectrum.
The spectrum does not contain all the colors that the human visual system can distinguish. Unsaturated colors such as pink, or purple variations like magenta, for example, are absent because they can only be made from a mix of multiple wavelengths. Colors containing only one wavelength are also called pure colors or spectral colors. [8] [9]
In 1666, Isaac Newton observed the Sun's light using a prism, and showed that it is made up of light of many colors. [189] In 1800, William Herschel discovered infrared radiation beyond the red part of the solar spectrum. [190]
We also see the Rayleigh effect at play in: -Sunsets where the sky is red.Light has to pass through a larger part of the atmosphere when the sun is lower on the horizon. Red, orange and yellow ...
No mixture of colors, however, can produce a response truly identical to that of a spectral color, although one can get close, especially for the longer wavelengths, where the CIE 1931 color space chromaticity diagram has a nearly straight edge. For example, mixing green light (530 nm) and blue light (460 nm) produces cyan light that is ...
Color emitted by a black body on a linear scale from 800 kelvins to 12200 kelvins The emission spectrum of a light source varies depending on the light generating mechanism. Thermal sources such as incandescent bulbs produce electromagnetic radiation over a broad and continuous range of wavelengths, including infrared and ultraviolet.
On Mars, the setting Sun appears about two-thirds the size it does from Earth, [21] due to the greater distance between Mars and the Sun. The colors are typically hues of blue, but some Martian sunsets last significantly longer and appear far redder than is typical on Earth. [22] The colors of the Martian sunset differ from those on Earth.
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.