Question

a 4.5cm needle is placed 12cm away from a convex mirror of focal length 15cm.Give the location of the image and its magnification​

Answer 1

Answer:

As the needle is moved further from the mirror, image moves away from the mirror till it is at focus F of the mirror the size of the image goes on decreasing. ⇒ h₂ = 2.5 cm. As the needle is moved further from the mirror, image moves to the focus and the size of image goes on decreasing .

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