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What is the difference between focal len...

What is the difference between focal length of convex and concave length?

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Focal length of convex lens is positive while that of concave lens is negative.
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TARGET PUBLICATION-LENSES -Answer the following
  1. State the rules used fro drawing ray diagrams for the formation of an ...

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  2. Explain Cartesian sign convention in case of refraction through lens.

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  3. What is the difference between focal length of convex and concave leng...

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  4. Use your brain power! M=(h(2))/(h(1))" …..(i)" M=(v)/(u)" …..(ii...

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  5. What is the power of a lens ?

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  6. If two lenses of focal lengths f(1) and f(2) are kept in contact with ...

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  7. Give an account of the structure of human eye.

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  8. What is the function of the iris and the muscles connected to the lens...

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  9. The order of the three layers of cells in the retina of human eye from...

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  10. Match the columns in the following table and explain them.

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  11. What difference can be seen between eyeball suffering from nearsighted...

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  12. Surabhi from Std. X uses spectacles. The power of the lenses in her sp...

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  13. Surabhi from Std. X uses spectacles. The power of the lenses in her sp...

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  14. Tanrnayee from Std. X uses spectacles. The power of the lenses in her ...

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  15. Explain the following sentence with neat diagram. A tree far away fr...

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  16. Explain how concave lenses are used in the following devices. Medica...

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  17. Explain how concave lenses are used in the following devices. Camera...

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  18. Explain how concave lenses are used in the following devices. House ...

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  19. Explain how concave lenses are used in the following devices. Torch

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  20. Explain how concave lenses are used in the following devices. Specta...

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