Q. 463.9( 7 Votes )

The focal length

Answer :

Given


The distance of the object from the mirror (u) = - 40cm (as the object is on the left side of mirror and acc. To our sign convention)


The focal length of the mirror (f) = -30 cm (Focal length is negative in case of the concave mirror.)


Image distance (v) = ?


Magnification (m) = ?


Formula Used




Using mirror formula



V = -120 (same side of mirror)


The image is real.


Magnification = = -3


Hence, the image is 3 times the object and image is inverted.


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