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Question
The unit of power of lens is ______.
Options
Centimetre
Dioptre
Watt
Metre
Dyne
None of these
MCQ
Fill in the Blanks
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Solution
The unit of power of lens is dioptre.
Explanation:
The SI unit of power of a lens is dioptre (D), which corresponds to $$1\text{ m}^{-1}$$. Metre is the unit of focal length, and dyne is a unit of force.
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