An object is placed at a distance of 8 cm form a convex mirror of focal length 12 cm. Find the position of the image formed?
According to the question;
Focal length (f) = 12cm;
Object distance (u) = -8cm;
By mirror formula;
⇒ 
⇒ v = 
.
Since v = 4.8cm which is positive hence image is behind the mirror.
The image is formed at the distance of 4.8 cm behind the mirror and is virtual and erect.
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