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What is a convex lens ?...

What is a convex lens ?

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A lens having both spherical surfaces puffed up outwards is called a convex lens or double convex lens or biconvex lens. It is thicker in the middle than at the edges.
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Two point sources S_(1) and S_(2) are 24 cm apart. What should a convex lens of focal length 9 cm be placed between them so that the images of both sources formed at the same place ?

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State used of a convex lens.

NAVNEET PUBLICATION - MAHARASHTRA BOARD-LENSES-Answer the following questions :
  1. Make a list of optical devices you know.

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  2. Do you know which is the natural optical device ?

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  3. What is a convex lens ?

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  4. What is a concave lens ?

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  5. Draw neat labelled diagrams : Type of lenses.

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  6. In general, when a ray of light pasess through a lens, there occurs a ...

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  7. With reference to spherical lenses, state the meaning of the following...

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  8. State the rules used for drawing ray diagrams for the fomation of an i...

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  9. In the case of a convex lens, show the path of the refraction ray when...

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  10. Draw neat and well labelled ray diagrams for image formation by a conv...

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  11. Draw neat and well labelled ray diagrams for image formation by a conv...

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  12. Draw neat and well labelled ray diagrams for image formation by a conv...

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  13. Draw neat and well labelled ray diagrams for image formation by a conv...

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  14. Draw neat and well labelled ray diagrams for image formation by a conv...

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  15. Draw neat and well labelled ray diagrams for image formation by a conv...

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  16. Observe the following figure and complete the table :

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  17. At which position will you keep an object in front of a convex lens to...

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  18. At which position will you keep an object in front of a convex lens to...

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  19. State the rules used fro drawing ray diagrams for the formation of an ...

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  20. State the characteristics of an image formed by a concave lens.

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