Question

will the shadow of the size and shape of a tree change when sun sets and rises

Answer 1

yes it will change its size and shape when the sun rises or falls

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Answer 2

The size of our shadow changes with the time of the day as we walk. In the noon, shadow will be smallest as the Sun is exactly over the head and a little light is blocked by our body to form shadow. During sunrise (sunset), the shadow formed is larger in size, as the Sun rises from the horizon (sets in the horizon) and more sunlight is blocked by our body to form longer shadow.