Q25 of 284 Page 253

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?

(a) Convex lens can form An inverted magnified image.

(b) Convex lens can form An erect magnified image.


(c) Convex lens can form An inverted diminished image.


(d) Concave lens can form An erect diminished image.


More from this chapter

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23

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?

 24

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.

 1

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?

 2

A 50 cm tall object is at a very large distance from a diverging lens. A virtual, erect and diminished image of the object is formed at a distance of 30 cm in front of the lens. How much is the focal length of the lens?