The SI-related practical unit of power of a lens is
Options
- A. Metre
- B. Dioptre
- C. Watt
- D. Pascal
- E. None of the above
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Correct Answer (Detailed Explanation is Below)
B. Dioptre
Detailed Explanation
The power of a lens is measured in dioptres (D), equal to inverse focal length when focal length is expressed in metres.
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