why the length and direction of the shadow keeps changing at different hours of a day
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Shadow is formed when an opaque object stands as an obstruction in the path of light.
We know that the size and direction of shadows vary during different times of the day.
This is due to the changing position of the sun.
For instance, our shadow is the shortest at 12 noon, when the sun is right over our head.
On the other hand, shadows appear longer during sunrise or sunset.
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