定安骨汤
幼苗
共回答了14个问题采纳率:85.7% 举报
It is because that the length of your shadow L equals H/tan(a) where H is your height and a is the angle between the horizon and the line connects the end of your shadow far from you and the sun. When the sun gets lower, the angle a will get smaller and the shadow will get longer.
1年前
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