Two thin convex lenses and of focal lengths and respectively are placed coaxially apart
PHYSICS · Multi-part · CBSE · Physics · Ray Optics and Optical Instruments · Ray Optics and Optical Instruments
Problem
Two thin convex lenses L1 and L2 of focal lengths 15cm and 20cm respectively are placed coaxially 30cm apart. An object 2cm high is kept 25cm in front of L1 on the common principal axis.
(i) Calculate the position and height of the image formed by lens L1 alone.
(ii) Treating the image formed by L1 as the object for L2, calculate the position of the final image with respect to L2.
(iii) Determine the overall linear magnification produced by the two–lens combination.
(iv) State the nature of the final image (real or virtual, erect or inverted, enlarged or diminished).