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Question

A boy uses spectacles of focal length 60 cm. Name the defect of vision he is suffering from which lens is used for the correction of this defect? Compute the power of this lens

A
- 1.67 D
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B
1.67 D
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C
0.067 D
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D
-.0.67 D
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Solution

The correct option is B 1.67 D
Thepersonissufferingformmyopia.p=1fNotebeforeapplyingtheformulacheckifthegivevalueisinmerters...inthiscaseweneedtoconvertintom10.6=1.67DHence,theoptinBisthecorrectanswer.

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