A concave lens of focal length forms an image of an object in front of it

PHYSICS · Subjective · CBSE · Physics · Light — Reflection and Refraction · Light — Reflection and Refraction

Problem

A concave lens of focal length

15\,\text{cm}

forms an image of an object

40\,\text{cm}

in front of it. The object height is

3\,\text{cm}

. Calculate: (i) the image distance, (ii) the image height, and (iii) the magnification produced. (Use the Cartesian sign convention.)