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  2. Sunlight - Wikipedia

    en.wikipedia.org/wiki/Sunlight

    Sunlight takes about 8.3 minutes to reach Earth from the surface of the Sun. [3] A photon starting at the center of the Sun and changing direction every time it encounters a charged particle would take between 10,000 and 170,000 years to get to the surface.

  3. Solar irradiance - Wikipedia

    en.wikipedia.org/wiki/Solar_irradiance

    On a clear day, solar irradiance can reach 1000 W/m 2 with a diffuse component between 50 and 100 W/m 2. On average the cooling power of a passive daytime radiative cooling surface has been estimated at ~100-150 W/m 2 .

  4. Speed of light - Wikipedia

    en.wikipedia.org/wiki/Speed_of_Light

    From the angular difference in the position of stars (maximally 20.5 arcseconds) [98] it is possible to express the speed of light in terms of the Earth's velocity around the Sun, which with the known length of a year can be converted to the time needed to travel from the Sun to the Earth.

  5. Solar time - Wikipedia

    en.wikipedia.org/wiki/Solar_time

    On a prograde planet like the Earth, the sidereal day is shorter than the solar day. At time 1, the Sun and a certain distant star are both overhead. At time 2, the planet has rotated 360° and the distant star is overhead again (1→2 = one sidereal day). But it is not until a little later, at time 3, that the Sun is overhead again (1→3 = one solar day). More simply, 1→2 is a complete ...

  6. It Takes The Entire Rainbow Of Colors To Make The Sky Blue ...

    www.aol.com/news/takes-entire-rainbow-colors-sky...

    800-290-4726 more ways to reach us. Sign in. Mail. ... Our modern-day expert, ... The white appearance of sunlight reaching the Earth actually comes to us in all colors of the rainbow, ...

  7. Sun - Wikipedia

    en.wikipedia.org/wiki/Sun

    Sunlight on the surface of Earth is attenuated by Earth's atmosphere, so that less power arrives at the surface (closer to 1,000 W/m 2) in clear conditions when the Sun is near the zenith. [100] Sunlight at the top of Earth's atmosphere is composed (by total energy) of about 50% infrared light, 40% visible light, and 10% ultraviolet light. [101]

  8. The sun is shining in WA, but for how long? Here’s how much ...

    www.aol.com/news/sun-shining-wa-long-much...

    The summer solstice on June 20 marked the day we enjoyed the most hours of sunlight. So how many minutes a day will we lose until fall? ... 800-290-4726 more ways to reach us. Sign in. Mail. 24/7 ...

  9. The time when a day on Earth was just 19 hours long - AOL

    www.aol.com/lifestyle/day-earth-used-just-19...

    Known affectionately to scientists as the "boring billion," there was a seemingly endless period in the world's history when the length of a day stayed put. The time when a day on Earth was just ...