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Magnification of Mirrors

If an object ...

Question

If an object placed at the centre of curvature of a concave mirror moves towards the focus, then the magnitude of magnification .

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Solution

As the object moves from the centre of curvature (C) towards the focus (F), the height of the image increases. Thus the magnitude of magnification increases.

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Q. A concave mirror produces magnification of +4. The object is placed:

(a) at the focus
(b) between focus and centre of curvature
(c) between focus and pole
(d) beyond the centre of curvature

Q. In order to obtain a magnification of, −0.6 (minus 0.6) with a concave mirror, the object must be placed:

(a) at the focus
(b) between pole and focus
(c) between focus and centre of curvature
(d) beyond the centre of curvature

Q. How will the magnitude of magnification of a concave mirror changes, if an object placed at the centre of curvature is moved towards the Focus of the mirror?

How will the magnitude of magnification change if an object placed at center of curvature is moved towards focus in concave mirror?

How will the magnitude of magnification change, if an object placed at the center of curvature of a concave mirror is moved towards the focus?

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