How much lux does the Sun emit? - Physics Stack Exchange
When you look 'at the world' (i.e. to the horizon) on a clear day, unlesss the sun is at a very low angle, the surface of your eye is not illuminated directly by the sun, only reflected sunlight from …
everyday life - Why do sunbeams diverge even though the sun is …
2014年12月26日 · The same applies to the beams of light above them. The Sun is very far away and the beams are pretty much parallel, but they're pointing towards you, and perspective …
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sun - Why is sunlight spectrum continuous? - Physics Stack …
The continuous spectrum of the visible photosphere of the Sun is attributable to the radiative equilibrium of the $\mathrm{H}^{-}$ ion. This has been recognised for at least 80 years ( Wildt …
Why does the Sun appear larger during the sunrise and sunset?
2017年7月22日 · $\begingroup$ Just one addition: I think it may also be plausible that due to the sun rising, the atmospheric scattering does not disperse as much light, so that the sun's …
How does the Earth's orbit change as the Sun decreases in mass?
2020年3月10日 · Now the Sun loses a small amount of mass. The Earth is still traveling at the same velocity, and requires the same centripetal force to maintain the same circular orbit. …
What is actually meant by 'sun set' and 'sun rise' times, when …
2017年2月15日 · The Sun has actually set/risen and we see it due to the way light is bent across the atmosphere. Apparently due to coincidence of the size and distance of the sun, its exactly …
What does the Moon's orbit around the Sun look like?
2016年7月6日 · The Moon' orbit around the Sun is a composition of the Moon'orbit around the center of mass of the system Earth/Moon and the orbit of this center of mass around the Sun. …
What is the simplest way to prove that Earth orbits the Sun?
2015年4月17日 · If we assume the Sun orbits the Earth, the math says that the Sun should be much less massive than the Earth. If we assume the Earth orbits the Sun, the opposite is true. …
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