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Mirror Formula and Magnification

In order to o...

Question

In order to obtain a magnification of, -2 (minus 2) with a concave mirror, the object should be placed : (a) between pole and focus (b) between focus and centre of curvature (c) at the centre of curvature (d) beyond the centre of curvature

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Solution

Answer : (b) between focus and center of curvature

Explanation: magnification -2 means that image is inverted and large. It is obtained when the object is between focus and center of curvature.
Diagram:

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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. If a magnification of, −1 (minus one) is to be obtained by using a converging mirror, then the object has to be placed:

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

Q. If a concave mirror forms a real magnified image of an object, the object is located

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

The image formed by a concave mirror is observed to be virtual, erect and larger than the object. Where should be the position of the object?

(a) Between the principal focus and the centre of curvature

(b) At the centre of curvature

(c) Beyond the centre of curvature

(d) Between the pole of the mirror and its principal focus.

Q. Question 2
The image formed by a concave mirror is observed to be virtual, erect and larger than the object. Where should be the position of the object?

(a) Between the principal focus and the centre of curvature
(b) At the centre of curvature
(c) Beyond the centre of curvature
(d) Between the pole of the mirror and its principal focus

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