Physics - Geometrical Optics Question with Solution | TestHub

Refraction from lens $$\begin{array}{rl}\frac{1}{v_1}-\frac{1}{-20}& =\frac{1}{15}\\ v& =60\mathrm{cm}\end{array}$$
i.e., first image is formed at $60\mathrm{cm}$ to the right of lens system. Reflection from mirror After reflection from the mirror, the second image will be formed at a distance of $60\mathrm{cm}$ to the left of lens system. Refraction from lens $$\begin{array}{rl}\frac{1}{v_3}-\frac{1}{60}& =\frac{1}{15}\\ v_3& =12\mathrm{cm}\end{array}$$