Magnitude of magnification due to the first (convex) lens is 3 u 2 = + (120 – 8) cm = +112 cm (object virtual);
f2 = – 20 cm which gives v2
112
9220
= −
×
cm
Magnitude of magnification due to the second (concave)
Rationalised 2023-24
348
Physics
lens = 20/92 Net magnitude of magnification = 0 652
Size of the image = 0