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What is the relation between the focal l...

What is the relation between the focal length and radius of curvature of a spherical mirror (concave mirror or convex mirror ) ? Calculate the focal length of a sphrical mirror whose radius of curvature is 25 cm.

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The correct Answer is:
12.5 cm
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LAKHMIR SINGH & MANJIT KAUR-REFLECTION OF LIGHT -Exercise
  1. What is a spherical mirror, ? Distinguish between a concave mirror and...

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  2. Name the two types of spherical mirrors. What type of mirror is repres...

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  3. What is the relation between the focal length and radius of curvature ...

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  4. Explain with a suitable diagram, how a concave mirror converges a para...

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  5. Describe with a suitable diagram, how a convex mirror diverges a paral...

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  6. Define (a) centre of curvature (b) radius of curvature ( c) pole (d) p...

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  7. In a convex spherical mirror, reflection of light takes place at :

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  8. A diverging mirror is :

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  9. If R is the radius of curvature of a spherical mirror and f is its len...

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  10. The focal length of a spherical mirror of radius of curvature 30 cm is...

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  11. If the focal length of a spherical mirror is 12.5 less cm, its radius ...

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  12. A communications satellite in orbit sends a parallel beam of signals ...

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  13. When a spherical mirror is held towards the sun and its sharp image is...

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  14. For what position of an object, a concave mirror forms a real image e...

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  15. Where should an object be placed in front of the mirror so as to obtai...

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  16. Where should an object be held so that a concave mirror forms a real, ...

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  17. An object is placed at the focus of a concave lens. Where will be imag...

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  18. Where is the image formed when an object is at large distance from a c...

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  19. For what position of an object, a real and diminished image is formed ...

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  20. Copy this figure in your answer book and show the direction of the lig...

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