Question

According to the "New Cartesian Sign Convention" for mirros, when sigh has been given to the focal length of :
(i) a concave mirror ?
(ii) a convex mirror ?

Answer 1

Answer:

1. A concave mirror has - sign for focal length
2. A convex mirror has + sign for focal length

Answer 2

Answer:

if we measure in direction of light then sign is positive

otherwise negative

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