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Question
The following figure shows a source of light (L), a solid (S) and its shadow (P) on a screen (M).
The shape of (P) was observed to be a circle. What could possibly be the shape of (S)?
The following figure shows a source of light (L), a solid (S) and its shadow (P) on a screen (M).
The shape of (P) was observed to be a circle. What could possibly be the shape of (S)?
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Solution
The correct option is B A sphere
When light is cast upon a 3-D object, the shadow formed is a 2-D shape. Hence, the 2-D image of a sphere (ball) is a circle.
When light is cast upon a 3-D object, the shadow formed is a 2-D shape. Hence, the 2-D image of a sphere (ball) is a circle.
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