Q. 5 C4.2( 69 Votes )

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Answer :

According to the question;

Focal length (f) = -10cm;


Length of stick (Lo) = 10cm;


Length of image = Li;


Object distance (u) = -20cm;


By mirror formula;







v = -20.


Since v = - 20 cm which is negative hence image is at left side of mirror.


Now


Magnification = =


Putting values of v and u .


Magnification =


=


Negative sign means image is inverted.



Hence Li = Lo .


Hence length of image is 10 cm


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