Q. (a) Why magnification is taken negative for real images and positive for virtual images?
(b) Why convex mirror is used in rear view mirrors and not concave mirror?
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2
Answer:
b) Because convex mirrors are seen as near to us
so it is used in rear view mirrors.
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Answer:
(a)- Magnification is the ratio between the height of the object and the height of the image
In the case of a real image the height of the object carries a positive sign with the height of the image carries a negative one
hence the Magnification is negative
In case of a virtual image the height of the image as well as the height of the object carries a positive sign
therefore, the Magnification is positive
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