5. A 4.5 cm needle is placed 12 cm away from a convex mirror of focal length 15cm. Give the location of the image and the magnification. Describe what happens as the needle is moved farther from the mirror.
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1/v=1/15+1/12=9/60
=60/9=6.67cm
m=6.67/12=0.56cm
if needle is moved farther image size will goes on decreasing
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