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Draw a diagram to show how a converging ...

Draw a diagram to show how a converging lens held close to the eye acts as a magnifying glass. Why is it usual to choose a lens of short focal length for this purpose rather than one of long focal length?

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LAKHMIR SINGH & MANJIT KAUR-REFRACTION OF LIGHT-Exercise
  1. a) What type of lens is shown in the diagram on the right? What will h...

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  2. Where must the object be placed for the image formed by a converging l...

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  3. Draw a diagram to show how a converging lens held close to the eye act...

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  4. How would you find the focal length of a convex lens rapidly but appro...

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  5. a) With the help of a labelled diagram explain how a convex lens conve...

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  6. a) With the help of a labelled diagram, explain how a concave lens div...

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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