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Which of the following is/are not always necessary to observe a shadow?

(a)     Sun

(b)     Screen

(c)     Source of light

(d)     Opaque object

Answers (1)

best_answer

Sun is not always necessary to observe a shadow. Sun is a source of light. Any other source of light can replace it. eg.torch, candle etc.

Hence option (A) is correct.

Posted by

Sumit Saini

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