Lens Maker Formula
Lens maker formula (thin lens) is:
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About This Question
- Subject
- physics
- Chapter
- optics
- Topic
- lens maker formula
- Difficulty
- Medium
- Year
- 2025
Solution
Correct Answer:
1/f = (n-1)(1/R1 - 1/R2)
The Lens Maker's Formula relates the focal length (f) of a lens to its physical properties: f1=(nrel−1)(R11−R21)
- nrel is the refractive index of the lens material relative to the surrounding medium.
- R1,R2 are the radii of curvature of the two lens surfaces.
- Proper sign conventions must be used for R (e.g., R is positive if the center of curvature is on the side of the outgoing light).
This medium difficulty physics question is from the chapter optics, covering the topic of lens maker formula. It appeared in the 2025 exam.
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