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If the radius of curvature of a convex mirror is 40 cm, then its focal length is

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MBD -HARYANA BOARD-LIGHT:REFLECTION AND REFRACTION-EXAMPLE
  1. Define one dioptre of power of a lens.

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  2. The radius of curvature of a concave mirror is 30 cm what is its focal...

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  3. If the radius of curvature of a convex mirror is 40 cm, then its focal...

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  4. A concave mirror produces three times magnified real image of an objec...

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  5. An object is placed at a distance of 10 cm from a convex mirror of foc...

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  6. Light enters from air to diamond with refractive index 2.42 What is th...

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  7. Calculate speed of light in water of refractive index 4//3. Given spee...

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  8. The reflective index of water with respect to air is 4//3 and the refl...

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  9. An object is 2m from a lens which forms an erect image one-fourth (exa...

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  10. A convex lens of focal length 20 cm is placed at a distance of 24 cm f...

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  11. A concave lens has focal length of 15 cm. At what distance should an o...

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  12. A convex lens of power 4 D is placed at a distance of 40 cm from a wal...

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  13. Which mirror has a wider field of view ?

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  14. Define principal axis of a spherical mirror.

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  15. What is concave mirror

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  16. What is convex mirror?

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  17. Define principal focus.

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  18. Define the focal length of a spherical mirror.

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  19. What is refraction of light ? Give example.

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  20. Define refractive index.

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