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What is the power of a lens ?...

What is the power of a lens ?

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The capacity of a lens to converge or diverge incident rays is called its power of a lens.
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The radius of curvature of the convex surface of a thin plano-convex lens is 12 cm, and the refractive index of its material is 1.6. What is the power of lens ?

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TARGET PUBLICATION-LENSES -Answer the following
  1. What is the difference between focal length of convex and concave leng...

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

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  3. What is the power of a lens ?

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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  19. Describe the construction and working of compound microscope.

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  20. Explain the working of an astronomical telescope using refraction of l...

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