JEE Main & Advanced
Physics
Ray Optics
Question Bank
Numerical Value Type Questions - Ray Optics and Optical Instruments
question_answer
A converging beam of rays is incident on a diverging lens. Having passed through the lens the rays intersect at a point 15 cm from the lens. If the lens is removed the point where the rays meet will move 5 cm closer to the mounting that holds the lens. Find focal length (in cm) of the lens.