An L-shaped opaque object is placed between a torch and a screen. Which shadow is impossible to form by simply rotating the object?
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Worked Solution
Step 1: The shadow of an object depends on its cross-sectional profile relative to the light.
Step [2-9]: An L-shaped object is made of flat surfaces and corners.
Step [2-9]: It has no curved parts, so it cannot produce a circular shadow.
Correct answer: A circle
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