A 4.5 cm needle is placed 12 cm away from a convex mirror of focal length 15 cm. Give the location of the image and the magnification. Describe what happens as the needle is moved farther from the mirror.

Explanation

`v = 6.7cm`. Magnification `= 5//9`, i.e., the size of the image is 2.5cm. As `urarroo, vrarrf` (but never beyond) while `mrarr0`