Is a shadow on the ground, cast by sunlight, the same width as the object that cast it?

Is a shadow on the ground, cast by sunlight, the same width as the object that cast it?
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answer:Yes. The rays of light are all parallel to each other because they all come from the sun, which is very, very far away. There will always be some fuzziness at the shadow’s edges because the sun appears as a disk rather than point, but at 0.5 degrees wide in the sky it’s nearly a point source. Your method should be fairly accurate IF you measure the wall’s shadow along a line parallel to the wall—otherwise you need trigonometry.
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