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Which type of lenses are: a) Thinner i...

Which type of lenses are:
a) Thinner in the middle than at the edges?
b) thicker in the middle than at the edges?

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a) Concave lenses, b) Convex lens
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LAKHMIR SINGH & MANJIT KAUR-REFRACTION OF LIGHT-Exercise
  1. If the image formed by a lens is always diminished and erect, what is ...

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  2. Copy and complete the diagram below to show what happens to the rays o...

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  3. Which type of lenses are: a) Thinner in the middle than at the edges...

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  4. A ray of light is going towards the focus of a convex lens. Draw a ray...

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  5. a) What type of images can a convex lens make? b) What type of image...

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  6. Take down this figure into your answer book and complete the path of t...

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  7. Fill in the following blanks with suitale words: A) A convex lens ……...

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  8. Things always look small on viewing through a lens. What is the nature...

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  9. An object lies at a distance of 2f from a concave lens of focal length...

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  10. Show by drawing a ray-diagram that the image of an object formed by a ...

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  11. Give the position, size and nature of image formed by a concave lens w...

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  12. Which type of lens is: a) a converging lens, and which is (b) a diverg...

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  13. With the help of a diagram, explain why the image of an object viewed ...

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  14. How would a pencil look like if you saw it through a) a concave lens, ...

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  15. a) An object is placed 10 cm from a lens of focal length 5 cm. Draw th...

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  16. a) Construct ray diagrams to illustrate the formation of a virtual ima...

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  17. When an object is kept at any distance in front of a concave lens, the...

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  18. When sunlight is concentrated on a piece of paper by a spherical mirro...

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  19. A beam of parallel light rays is incident through the holes on one sid...

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  20. A beam of light is incident through the holes on one side of a box eme...

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