Question

why the gocal lemght of a convex mirror is positive and in concave negative. do not spam otherwise i will report​

Answer 1

Answer:

r. By convention, distances are measured, along the central axis, as positive from the mirror in the direction of the object and negative away from the object. Hence the radius of curvature and the focal length are positive for concave mirrors and negative for convex mirrors

Answer 2

Answer:

f, the focal length, is positive for a concave mirror, and negative for a convex mirror. ... When the image distance is negative, the image is behind the mirror, so the image is virtual and upright. A negative m means that the image is inverted. Positive means an upright image

Explanation:

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