Which of the following objects can form a shadow?

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wooden box, cement wall

cardboard

a person’s body

All of the above

answer is D.

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Detailed Solution

A person’s body can form a shadow in a wooden box, cement walls, and cardboard.
Objects that can form a shadow are opaque. Shadows are formed when opaque substances illuminate a light source; an area of darkness is formed due to opaque substances blocking the light from passing through it. To form a shadow, this is the requirement that a source of light and an opaque object is necessary.

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