Q. 135.0( 3 Votes )

At what distance should an object be placed from a convex lens of focal length 18 cm to obtain an image at 24cm from it on the other side. What will be the magnification produce in this case?

Answer :

We are given that,

f = 18 cm, v = 24 cm, u =? m =?

Using the lens formula and substituting the values in it,


Magnification, determines the ratio of the size of the image formed by refraction from the lens to the size of the object.

v= Image distance

u= Object distance

Negative sign indicates that the image is real and inverted.

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