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a) An object is placed well outside the ...

a) An object is placed well outside the principle focus of a convex lens. Draw a ray diagram to show how the image is formed, and say whether the image is real or virtual.
b) What is the effect on the size and position of the image of moving the object i) towards the lens, and ii) away from the lens?

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(a) An object is placed between f and 2f in front of a convex lens. Draw a labelled ray- diagram to show the formation of image. (b) State whether the image formed is real or virtual. © State whether the image formed is diminished or enlarged.

If an object is placed at the focus of a convex lens, where is the image formed?

The lens which forms a real image or a virtual image depending on the position of the object .

Draw ray diagram showing the image formation by a convex lens when an object is placed at twice the focal length of the lens.

Draw ray diagram showing the image formation by a concave lens when an object is placed at the focus of the lens.

Describe with the help of a ray-diagram, the size, nature and position of the image formed by a convex lens when an object is placed beyond 2f in front of the lens.

LAKHMIR SINGH & MANJIT KAUR-REFRACTION OF LIGHT-Exercise
  1. a) With the help of a labelled diagram, explain how a concave lens div...

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  2. Draw ray diagrams to represent the nature, position and relative size ...

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  3. a) An object is placed well outside the principle focus of a convex le...

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  4. a) Explain what is meant by a virtual, magnified image. b) Draw a ra...

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  5. A convex lens a focal length of 10 cm. At which of the following posit...

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  6. Which one of the following materials cannot be used to make a lens ?

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  7. A small bulb is placed at the focal point of a converging lens. When t...

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  8. An illuminated object is placed at a distance of 20 cm from a convergi...

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  9. An object is placed between f and 2f of a convex lens. Which of the fo...

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  10. Given a point source of light, which of the following can produce a pa...

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  11. In order to obtain a real image twice the size of the with a convex le...

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  12. A converging lens is used to produce an image of an object on a screen...

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  13. A convex lens of focal length 8 cm forms a real image of the same size...

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  14. A virtual, erect and magnified image of an object is to be obtained wi...

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  15. A burning candle whose flame is 1.5 cm tall is placed at a certain dis...

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  16. A lens of focal length 12 cm forms an upright image three times the si...

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  17. If an object is placed 21 cm from a converging lens, the image formed ...

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  18. An object is placed at the following distances from a convex lens of f...

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  19. When an object is placed at a distance of 36 cm from a convex lens, an...

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  20. a) Draw a diagram to show how a converging lens focusses parallel rays...

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