An object is placed in front of a spherical mirror whose 2 times magnified images is formed on the screen. Then choose the CORRECT option:-

Mirror is concave m= +2

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Mirror is concave m= -2

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Mirror is convex m=+2

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Mirror is convex m= -2

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Solution

The correct option is B Mirror is concave m= -2
The spherical mirror can not be
convex because it does not form
real image (that can be formed on a screen).
So, the mirror has to be
conceal. In case of concave mirror,
the real image is formed if the
object distance greater than focal
length. For enlarged real image
the object should be placed
between the center and focus of
the mirror. The image formed
will be real, enlarged and inverted
so, the magnification will be -2.

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