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What is a concave lens ?...

What is a concave lens ?

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A lens having both spherical surfaces curved inwards is calles a concave lens or double concave lens or biconcave lens. It is thicker at the edges than in the middle.
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NAVNEET PUBLICATION - MAHARASHTRA BOARD-LENSES-Answer the following questions :
  1. Do you know which is the natural optical device ?

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  2. What is a convex lens ?

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  3. What is a concave lens ?

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  4. Draw neat labelled diagrams : Type of lenses.

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

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

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

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

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

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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. Observe the following figure and complete the table :

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

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

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

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  20. In the case of image formation by a concave lens , what can you say a...

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