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The radius of curvature of a spherical mirror is 20cm.What is its focal length?

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MBD-LIGHT:REFLECTION AND REFRACTION-EXAMPLE
  1. Define the principal focus of concave mirror.

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  2. The radius of curvature of a spherical mirror is 20cm.What is its foca...

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  3. Name a mirror which can give an erect and enlarged image of an object

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  4. Why do we perfer a convex mirror as back view mirror in vehicles?

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  5. Find the focal length of convex mirror whose radius of curvature is 32...

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  6. A concave mirror produces three times magnifed (enlarged) real image o...

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  7. A ray of light travelling in air enters obliquely into water. Does the...

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  8. Light enters from air to glass having refractive index 1.50 what is sp...

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  9. Find out from table 10.3 of the text-bool, the medius having highest o...

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  10. Refractive indices of kerosene,turpentine and water are 1.44, 1,47 and...

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  11. The refractive index of diamond is 2.42.What is the meaning of this st...

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  12. Define 1 dioptre of power of a lens

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  13. What is power of lens? Give commercial unit of power?

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  14. A convex lens from a real and inverted image of a needle at a distance...

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  15. Find the power of a concave lens of focal length 2 meters?

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  16. Which of the following materials cannot be used to make a lens?

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  17. The image formed by a concave mirror is observed to be virtual, erect ...

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  18. Where should an object be placed in front of a convex lens to get a re...

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  19. A spherical mirror and a thin spherical lens have each a focal length ...

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  20. No matter how you stand from a mirror, your image apperas erect.The mi...

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