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The focal length of a spherical mirror o...

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

A

10 cm

B

15 cm

C

20 cm

D

30 cm

Text Solution

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The correct Answer is:
B
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LAKHMIR SINGH & MANJIT KAUR-REFLECTION OF LIGHT -Exercise
  1. A diverging mirror is :

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

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

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

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

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

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

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

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

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

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

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

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

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  14. Draw Fig. in your answer book and show the formation of image with the...

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  15. Draw Fig. in your answer book and show the formation of image with the...

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  16. Which type of mirror could be used as a dentist's mirror ?

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  17. The mirror used for the head light of a car is

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  18. Explain why, a ray of light passing through the centre of curvature of...

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  19. What is the minimum number of rays required for locating the image for...

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  20. With the help of a ray diagram, determine the position, nature and siz...

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