in convex mirror radius of curvature is 20 cm image 8 cm behind mirror

1.	in convex mirror radius of curvature is 20 cm image 8 cm behind mirror find object
Answer» -40cm<br>Focal length=20/2=10cm : 1/v+1/u=1/f then 1/8+1/u=1/181/u=1/10-1/8 1/u=-1/40::U==-40cm

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