why does the sun sometimes look small or HUGE while setting? why does the sky sometimes have multicolors and other times nothing?

 

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wonders of the nature

 

The sun looks bigger because of an optical illusion. When the sun is near the horizon, it sometimes seems to be much bigger and closer than during the rest of the day. At sunrise or sunset, your brain has other objects to compare the sun's size to, such as trees and buildings.

The sun emits light of all colors that combine to make white light. At midday, the earth's atmosphere scatters the sunlight to make the sky appear blue and the sun a yellowish white. At sunrise and sunset, the sunlight is scattered even more because it passes through more atmosphere to get to your eyes. More scattering means a redder color. The sun's apparent color can also be affected by smoke, photochemical smog, or totally suspended particulate matter in the air which can enhance the scattering effect.

 

In LA there's more colors because of the Smog. Lots of crap for the light to bounce off of and refract etc.

 

The sun looks bigger because of the atmosphere's lensing effect. The curvature of the atmosphere and the angle at which the light hits it causes the light to refract, just like looking at an object through a lens.

 

The sun's gigantic magnetic field actually shrinks the earth as it's passing the horizon.. so in fact, the sun looks bigger because everything else has been shrunk by its cosmic rays.