alleryStart learning →As per your syllabus, what is 1 DIOPTRE — the SI unit of lens power?
AHalf the focal length
BThe power of any lens whatsoever
CTwice the focal length
DThe power of a lens whose focal length is 1 metre
Answer & Solution
Correct answer: D. The power of a lens whose focal length is 1 metre
As per your syllabus, 1 dioptre = lens with f = 1 m.
**So 1 D = 1 m⁻¹.**
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