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Question

Distances measured below the principal axis are taken as ........


A
Positive
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B
Negative
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C
None
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D
Both
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Solution

The correct option is B Negative
According to the sign convention followed for mirrors and for lenses, the distances measured above the principal axis are taken as positive and the distances measured below the principal axis are taken as negative.
Hence, the correct answer is OPTION B.

Physics

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