A combination of lenses for a camera contains two converging lenses of focal length 20 cm and 40 cm and - Maths - Real Numbers

Question

A combination of lenses for a camera contains two converging lenses
of focal length 20 cm and 40 cm and a diverging lens of focal
length 50 cm find the power and the focal length of this
combination

Pushpa Devi · Accepted Answer

A combination of lenses for a camera contains two converging lenses of focal length 20 cm and 40 cm and a diverging lens of focal length 50 cm find the power and the focal length of this combination