Measuring tall items or buildings is possible for you to do, even if you don't have a ladder. But how? In this experiment, you will be using shadow heights created by the sun to measure! You will ...
NASA would like you to take a picture of a tree, please. The space agency’s ICESat-2 satellite estimates the height of trees from space, and NASA has created a new tool for citizen scientists that can ...
THIS note describes a simple optical microscope shadow technique which permits measurement to be made of the heights of small objects such as particles, spores, steps on surfaces, etc., and also ...
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