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प्रश्न
The power of lens is measured in ______.
विकल्प
dioptre
cm−
m−1
none of these
MCQ
रिक्त स्थान भरें
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उत्तर
The power of lens is measured in dioptre.
Explanation:
The unit used to measure the power of a lens is the dioptre, denoted by D. It is equivalent to m−1, but the named unit is dioptre.
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