defence exam Indian Army Nursing Assistant Mock Test Series 2025 Physics Optics Mirrors and Images

If 'u' is object distance, 'v' is image distance and 'f' is focal length, then the mirror equation is __________.

1
1 / v - 1 / u = 1 / f
2
1 / v + 1 / u = -1 / f
3
1 / v + 1 / u = 1 / f
4
1 / u - 1 / v = 1 / f
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