When a fork is seen through lenses A and B one by one, it appears as shown in the diagrams. What is the nature of (i) lens A, and (ii) lens B? Give reason for your answer.

Which of the following can form a virtual image which is always smaller than the object?

When an object is placed 20 cm in front of lens A, the image is real, inverted, magnified and formed at a great distance. When the same object is placed 20 cm in front of lens B, the image formed is real, inverted and same size as the object.

(a) What is the focal length of lens A?

(b) What is the focal length of lens B?

(c) What is the nature of lens A?

(d) What is the nature of lens B?

What kind of lens can form?

(a) An inverted magnified image?

(b) An erect magnified image?

(c) An inverted diminished image?

(d) An erect diminished image?

The lens A produces a magnification of, - 0.6 whereas lens B produces a magnification of + 0.6.

(a) What is the nature of lens A?

(b) What is the nature of lens B?