alleryThe mirror formula relating object distance u, image distance v, and focal length f is:
A1/v + 1/u = 1/f
Bv + u = f
C1/v - 1/u = 1/f
Dv × u = f
Answer & Solution
Correct answer: A. 1/v + 1/u = 1/f
The mirror formula is 1/v + 1/u = 1/f.
It works for all positions of the object and both concave and convex mirrors, with the Cartesian sign convention applied.
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