Physics
JAMB 2005
The sharpness of the boundary of the shadow of an object is determined by the
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A.
intensity of light striking the object
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B.
rays of light passing through the object
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C.
nature of the object
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D.
opacity of the object
Correct Answer: Option B
Explanation
The sharpness of the boundary of the shadow of an object is determined by the rays of light passing through the object. The smaller the rays passing through , that is from a point source, the more sharp the shadow becomes, but the more the rays, that is rays from a large source, the more blurred the shadow becomes.
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