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Question

The length of the shadow will be shortest when

A
The angle between the source of light and the object is 45
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B
The source of light and the object are parallel to each other
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C
The source of light and the object are perpendicular to each other
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D
The angle between the source of light and the object is 60
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Solution

The correct option is D The source of light and the object are parallel to each other
When the light rays are parallel to the object there would be no obstruction in the path of light, so ideally there will be no shadow formed.
Thus option B is correct.

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