Multiple choice general knowledge science & technology

What is the SI unit of optical power of lens?

  1. Dopler

  2. Pascal

  3. Diopter

  4. Lumex
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Diopter (D) is the SI unit of optical power of a lens, equal to m⁻¹ (inverse meters). Pascal is pressure, Doppler is an effect (not a unit), and Lumex is not a standard unit.

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