Question

.One half of a convex lens is covered with blackpaper.

(a)Show the formation of image of a object placed at 2F,of such covered lens with the help of ray

diagram.Mention the position and nature of the image.(b)Draw the ray diagram for same object at same position in front of the same lens,but now

uncovered.Will there be any difference in image obtained in the two cases?Givereasonsforyouranswers.

Answer 1

Hope it helps...........

Answer 2

Nature of image:

Object is placed at 2F

We get, 2F1

----> Of same size

----> Real and Inverted

For fig. Plz see attachment

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