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,



ee7edc37005882eaed61e46a3c05bacb569cb0826ffbb0.11366994Realinvertedimage.jpg


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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