# A convex lens has a focal length of

Question:

A convex lens has a focal length of $10 \mathrm{~cm}$. Find the location and nature of the image if a point object is placed on the principal axis at a distance of

(a) $9.8 \mathrm{~cm}$,

(b) $10.2 \mathrm{~cm}$ from the lens.

Solution:

And magnification $\mathrm{m}=\mathrm{v} / \mathrm{u}=510 /-9.8=-52.04 \mathrm{~cm}$ As $m<1$. Then, Image is real and inverted.