Physics · Optics
Which of the following is NOT correct regarding the power of a lens?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1A 2D lens has focal length 0.5 m.
- 21 Dioptre = focal length of 1 m.
- 3A 5D lens has focal length 20 m.✓
- 4The SI unit of power of lens is Dioptre (D).
Correct answer
A 5D lens has focal length 20 m.
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