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Q.

The diagram below shows an object located at point P, 0.25 meter from a concave spherical mirror with principal focus F. The focal length of the mirror is 0.10 meter. How does the image change as the object is moved from point P toward point F?

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a

Its distance from the mirror decreases 

b

The size of image decreases
 

c

Its distance from the mirror increases 

d

The size of images increases

answer is C, D.

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Detailed Solution

As long as object moves towards the mirror image moves away from the mirror (for u > f) and m = –v/u     v > u so image size increases

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