Question

find the focal length of a convex spherical mirror which produces1/6th the size of an object
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Answer 1

Answer:

-0.075m

Explanation:

u=-0.12m=-12 cm , v=-0.2m=-20cm

1f=1v+1u

1f=-120-112

1f=-3-560 =-860=-215 ,f =-152 =-7.5m =-0.075m