1.

Magnification by a lens of an object at distance 10 cm from it is -2. now a seconnd lens is placed exactly at the same positon where first was kept, without changing the distance between object and lens. The magnification by this second lens is -3. What is the focal length of the combination when both lenses are in contact ?A. `60/17 cm `B. `5/17 cm `C. `12/7 cm `D. `13/9 cm `

Answer» Correct Answer - A


Discussion

No Comment Found

Related InterviewSolutions