1.

An object of 1 cm in length is placed at a distance of twice of focal length from a convex lens. the size of the image formed is?

Answer»

Let FOCAL length be F, u=2f1/v-1/u=1/f1/v=1/f+1/u1/v=1/f+1/2f=3/2fv=2f/3size of the IMAGE/size of the object=v/usize of the image/1=v/u=(2f/3)/(2f)=1/3size of the image =1/3 cm



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