Two transparent media having refractive indices 1.0 and 1.5 are separated by a spherical refracting surface of radius of curvature 30 cm. The centre…

Two transparent media having refractive indices $\displaystyle 1.0$ and $\displaystyle 1.5$ are separated by a spherical refracting surface of radius of curvature $\displaystyle 30$ cm . The centre of curvature of surface is towards denser medium and a point object is placed on the principle axis in rarer medium at a distance of $\displaystyle 15$ cm from the pole of the surface. The distance of image from the pole of the surface is $\displaystyle \_\_\_\_$ cm .