When a lens is inserted between an object and a screen that are a fixed distance apart

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

Problem

When a lens is inserted between an object and a screen that are a fixed distance apart, the size of the image is either

6\,\mathrm{cm}

\frac{2}{3}\,\mathrm{cm}

. Find the size of the object.