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Combination of Mirrors
### Formula
$$\frac1f=\frac1{f_1}+\frac1{f_2}$$
### Terminologies
- f → Equivalent focal length.
- f1, f2 → Focal lengths of mirrors.
### Usage
- Used in combined optical systems.
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Combination of Mirrors
### Formula
$$\frac1f=\frac1{f_1}+\frac1{f_2}$$
### Terminologies
- f → Equivalent focal length.
- f1, f2 → Focal lengths of mirrors.
### Usage
- Used in combined optical systems.
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