Question

2) A lens forms virtual and magnified image of an object placed near to it.

a) Identify the nature of the lens.

b) Where you will place the object to get such image.

3) Use appropriate terms for following:

a) Point on retina which is insensitive to light.

b) Ability to adjust the focal length of eye lens to see near and far objects.1) A student is not able to read topics written on the board but is able to read his books topics which is kept in his

hand. His friend talked to him about sightedness.

a) What are you thinking about his sightedness by which he is suffering from? Write its name.

b) What are the causes of such sightedness?

c) Which type of lens will be prescribed for him.​

Answer 1

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A lens forms virtual and magnified image of an object placed near to it.

a) Identify the nature of the lens.

b) Where you will place the object to get such image.

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For getting an erect, magnified and virtual image of an object, we have to keep the object between F

1

and the optical centre of a convex lens. The image is formed in the same side of the lens.

Answer 2

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For getting an erect, magnified and virtual image of an object, we have to keep the object between ....F1

and the optical centre of a convex lens. The image is formed in the same side of the lens.

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