Question

the image of an object placed at a distance of 10 cm from the convex lens is formed two times of the object towards the same side of the lens as that of the object. If the object is placed at a distance of 20cm on the same side from the lens, find the position and magnification of the image​

Answer 1

10cmf=12cmv=?we know,f1 = v1 − u1121 = v1 − 10(−1)v1 = 605−6v=−60 cm

Hence, image formed behind the mirror at a distance 60 cm and the image is virtual and magnified beyond 2F.