Question

A diverging lens with magnitude of focal length $25\, cm$ is placed at a distance of $15\, cm$ from a converging lens of magnitude of focal length $20\, cm$. A beam of parallel light falls on the diverging lens. The final image formed is :

• A. real and at a distance of 40 cm from convergent lens
• B. virtual and at a distance of 40 cm from convergent lens
• C. real and at a distance of 40 cm from the divergent lens
• D. real and at a distance of 6 cm from the convergent lens

Answer 1

Answer: (A)

real and at a distance of 40 cm from convergent lens

Answer 2

For converging lens
$u = -40$ cm which is equal to $2f$
$\therefore$ Image will be real and at a distance of 40 cm from convergent lens.