railway RRB NTPC Mock Test Series 2024-25 (CBT 1 + CBT 2) General Science Physics Optics

The relation between focal length ‘f’, object distance ‘u’ and image distance ‘v’ in the case of reflection of light by a spherical mirror is given by ________.

1
1/f = (uv)/(u+v)
2
1/f = (1/u) + (1/v)
3
1/f = (1/u) - (1/v)
4
1/f = (1/v) - (1/u)
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