Question

write the sign convention for u,v,f for concave and convex mirror
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Answer 1

Answer:

Since, object is always placed in front of themirror hence the sign of object is taken as negative. Since, the centre of curvature and focus lies behind the convex mirror, so sign of radius of curvature and focal length are taken as + (positive) in the case of convex mirror.

Answer 2

Answer:

1/v-1/u=1/f is that formula