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Can you change focal length of a given s...

Can you change focal length of a given spherical mirror by changing the object distance from the mirror?

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No, we cannot change focal length of a spherical mirror by changing the object distance (u), By changing u:v will change, but f will remain the same.
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PRADEEP-REFLECTION AND REFRACTION-Short Q/A
  1. A man standing in front of a special mirror finds his image having a s...

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  2. An object is placed at a distance of 12 cm in front of a concave mirro...

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  3. Can you change focal length of a given spherical mirror by changing th...

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  4. Can you change linear magnification of a spherical mirror by changing ...

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  5. How is the refractive index of a medium related to the speed of light ...

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  6. For the same angle of incidence in media P,Q and R, the angles of refr...

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  7. An object is placed at a distance of 40 cm in front of a convex mirror...

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  8. A ray of light travelling in air is incident on a rectangular glass sl...

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  9. If rafractive index of glass w.r.t. air is 3//2, what is the refractiv...

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  10. The correct sequencing of angle of incidence, angle of emergence, angl...

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  11. The refractive index of glass is 3//2 and refractive index of water i...

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  12. A coin in a glass beaker appears to rise as the beaker is slowly fille...

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  13. A tank of water is 4 m deep. How deep does it appear when seen normall...

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  14. What is meant by optical centre of a lens?

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  15. Define first principal focal length of a convex lens.

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  16. Give three basic differences between real image and virtual image.

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  17. What is linear magnification produced by a lens? How is it related to ...

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  18. When is magnification positive or negative ?

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  19. In which of the following cases, linear magnification is positive?

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  20. A student focuses the image of a candle flame, placed at about 2 m fro...

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