Mirror formula (1/f = 1/v + 1/u)
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1/f = 1/v + 1/u
What each symbol means
| Symbol | What it stands for |
|---|---|
| f | Focal length of mirror (Cartesian sign convention) (m) |
| u | Object distance from pole (m) |
| v | Image distance from pole (m) |
When to use this
Standard JEE / NCERT assumptions unless stated (paraxial, thin lens, coherent YDSE sources, etc.).