Question

When the object is placed 20 centimetre in front of the lens a the image is real inverted and magnified and formed at Infinity when the same object is placed 20cm in front of the lens be the image formed is real inverted and same size or that of the object. a) what is the focal length of the the length of a and b. b) nature of lens a and b

Answer 1

Answer:

When an object is placed at the centre of curvature in front of a convex lens, its image is formed at the centre of curvature on the other side of the lens. The image formed is real, inverted, and of the same size as the object.