FAQ/Sun: Difference between revisions
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The sun changes color gradually, things get darker before sunset. Also the light curves towards you. This is because light refracts in the upper atmos. You can prove this by looking at examples of "advances sunrise" and "delayed sunset". The sun has been seen to set, then rise again an hour later, then set an hour later and so forth. Wikipedia actually gave this advanced sunrise example. |
The sun changes color gradually, things get darker before sunset. Also the light curves towards you. This is because light refracts in the upper atmos. You can prove this by looking at examples of "advances sunrise" and "delayed sunset". The sun has been seen to set, then rise again an hour later, then set an hour later and so forth. Wikipedia actually gave this advanced sunrise example. |
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[[File:11162449 1139024712790519 270460653764564537 n.jpg|200px|right]] |
[[File:11162449 1139024712790519 270460653764564537 n.jpg|200px|right]] |
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Light curves up in the upper atmos and down in the lower atmos. This is due to Snells Law. Also the limits of our eyes, curved lenses and perspective play a role in this. Things below you such as the ground converge to the horizon. A curved lense on your eye or camera lense can produce a similar effect. When the sun goes below the horizon, there is still light for a good protion of the day so whether or not it is visible verses whether some of the lights reaches you are decoupled. However the things most people seem to forget about are air density and refraction/Snells Law. |
Light curves up in the upper atmos and down in the lower atmos. This is due to Snells Law. Also the limits of our eyes, curved lenses and perspective play a role in this. Things below you such as the ground converge to the horizon. A curved lense on your eye or camera lense can produce a similar effect. When the sun goes below the horizon, there is still light for a good protion of the day so whether or not it is visible verses whether some of the lights reaches you are decoupled. However the things most people seem to forget about are air density and refraction/Snells Law. |
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See the online Flat earth map and Sun Position tool <ref name=sunpos></ref> |
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===Snells Law=== |
===Snells Law=== |
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All chemical/elements have a refractive index so light will always change slightly everywhere it goes. these angular changes become extremely significant over many miles. When combining elements this can greatly exaggerate the refractivity. For example, by placing sugar in water you can see light bend using a laser pointer. Add to this diffusion, reflection and other important things that can happen to light in the atmos which require study. |
All chemical/elements have a refractive index so light will always change slightly everywhere it goes. these angular changes become extremely significant over many miles. When combining elements this can greatly exaggerate the refractivity. For example, by placing sugar in water you can see light bend using a laser pointer. Add to this diffusion, reflection and other important things that can happen to light in the atmos which require study. |
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=== References=== |
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<references> |
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<ref name="sunpos">[https://oudeicrat.github.io/ Gitub: Flat earth map and Sun Position tool]</ref> |
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</references> |
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