The thin lens formula is $\frac{1}{v} - \frac{1}{u} = \frac{1}{f}$, where $u$ is the object distance, $v$ is the image distance, and $f$ is the focal length. Sign convention follows the Cartesian system.
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JEE Main 2024 — Physics Optics
medium
mcq
2024
Official previous-year question
Verified 30 May 2026.
Question
The thin lens formula relating object distance $u$, image distance $v$, and focal length $f$ is:
Options
- A
$\frac{1}{v} - \frac{1}{u} = \frac{1}{f}$
- B
$\frac{1}{v} + \frac{1}{u} = \frac{1}{f}$
- C
$v - u = f$
- D
$uv = f$
Solution
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