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the position of the sun
Because the sun's change in apparent motion across the sky results in a change in the angle of the shadow that is cast.
The shadow is cast by the sun.As the earth rotates on it's axis, the sun appears to move across the sky in an arc.The height and direction of the sun is constantly changing throughout the day and so the shadow will also change. When the sun is high the shadow is short. When the sun is low, the shadow will be long.
It will Lengthen and shorten during the day, as the angle of the sun changes
when you move and when the sun angle changes
it is shortest at noon when the sun is directly over you
shadow will become short when it was xiawu and no shadow at night! haha At noon, when the sun aerial, and shadows is the shortest. When the sun goes down, the shadows change into the longest.
"how much does humidity change in a day?"
yes the weather conditons
The groundhog comes out on Groundhog's Day, and if it sees it's shadow, it goes back in and we have 3 more weeks of winter. If it doesn't see it's shadow, winter is over.
BeCause naturel shadows are caused by the sun and the sun moves during the course of the day. Therfore the shadow moves when the sun moves and gets longer when the sun is at its highest, miday:)
If you have no shadow, then it's any really rainy day, or any night. If you're standing up and your shadow is entirely between your feet, then the sky is clear and the sun is directly over your head. On the Tropic of Capricorn, that happens within a day either way of December 21.