Power Of Lens
Power P of lens (f in meters) equals?
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About This Question
- Subject
- physics
- Chapter
- optics
- Topic
- power of lens
- Difficulty
- Easy
- Year
- 2025
Solution
Correct Answer:
P = 1/f
- Definition: The power of a lens is a measure of its ability to converge or diverge light rays.
- Mathematical Relation: It is quantitatively defined as the reciprocal of the focal length (f).
- Formula: P=f1.
- Unit: The SI unit of power is the Diopter (D), where 1 D =1 m−1.
- Property: A converging (convex) lens has positive power, while a diverging (concave) lens has negative power.
This easy difficulty physics question is from the chapter optics, covering the topic of power of lens. It appeared in the 2025 exam.
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