Q10 of 56 Page 1

A 4cm tall object is placed perpendicular to the principal axis of a convex lens of focal length 24 cm. The distance of the object from the lens is 16 cm. Find the position, size and nature of the image formed, using the lens formula. 3

Given: Height of object, h1 = 4 cm


Focal length of convex lens, f = +24 cm


Object distance, u = -16 cm


Applying the lens formula:



On calculating we get,


v= -48 cm


Now size of the image can be calculated by:


Magnification is given by:



on calculating h2=12 cm


Therefore,the image will be formed as virtual, erect and magnified.


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