What is the mirror formula for a spherical mirror?
- A$\frac{1}{v} + \frac{1}{u} = \frac{1}{f}$
- B$\frac{1}{v} - \frac{1}{u} = \frac{1}{f}$
- C$\frac{1}{u} - \frac{1}{v} = \frac{1}{f}$
- D$\frac{1}{u} + \frac{1}{v} = f$
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