A diverging lens, focal length f1=20 cm is separated by 5 cm from a converging mirror, focal length f2=10 cm. Where should an object be placed from the lens so that a real image is formed at the object itself ?
A diverging lens of focal length 20 cm and a converging mirror of focal length 10 cm are placed coaxially at a separation of 5 cm. Where should an object be placed so that a real image is formed at the object itself ?