Q10 of 61 Page 1

A spherical mirror produces an image of magnification -1.0 on a screen placed at a distance of 30 cm from the pole of the mirror.

(i) Write the type of mirror in this case.


(ii) What is the focal length of the mirror?


(iii) What is the nature of the image formed?


(iv) Draw the ray diagram to show the image formation in this case.

Given: magnification of spherical mirror, m= -1.0

(i) Since the image is formed on the screen means that the image is real. Only concave mirror forms the real images. So, the mirror used is Concave mirror.


(ii) Magnification is given by:







so, f= -15 cm


(iii) The nature of the image formed is: Real, Inverted and of same size as that of the object.


(iv)The ray diagram will be as follows:



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