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Answer the following questions : An obj...

Answer the following questions :
An object is kept in front of a lens of focal length -20 cm . Describe the nature of the image when the object distance is 25 cm.

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Answer the following questions : An object is kept in front of a lens of focal length +10 cm . Describe the nature of the image in the following casses : the object distance in 25 cm the object distance in 5 cm.

Answer the following questions: An object is placed at 50 cm in front of a concave mirror of focal length 20 cm. State the nature and size of the image relative to that of the object.

Answer the following questions : An object is placed in front of a convex lens of focal length 20 cm. If the object distance is changed from 60 cm to 40 cm , what can you say about the size of the image relative to that of the object?

Answer the following questions: An object is placed at 10 cm in front of a concave mirror of focal length 25 cm. State the nature and size of the image relative to that of the object.

Answer the following questions: An object is placed at 45 cm in front of a concave mirror of focal length 30 cm. State the nature and size of the image relative to that of the object.

Solve the following examples/ numerical problems: An object of height 4cm is placed in front of a concave lens of focal length 40 cm. If the object distance is 60 cm, Find the position and height of the image .

Answer the following questions: An object is placed at 60 cm in front of a concave mirror of radius of curvature 60 cm. State the nature and size of the image relative to that of the object.

Answer the following questions : Express the magnification produced by a lens in terms of the focal length of the lens and the object distance the image distance.

Answer the following questions: When an object is kept at 50 cm in front of a concave mirror, Its real image is obtained at the same distance from the mirror. What is the focal length of the mirror?

An object is placed in front of a convex mirror of focal length 60 cm. If image formed is half the size of the object, the position of the image

NAVNEET PUBLICATION-LENSES-EXERCISE
  1. Answer the following questions : State two uses of a concave lens.

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  2. Answer the following questions : State two uses of a convex lens.

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  3. Answer the following questions : An object is kept in front of a lens...

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  4. Answer the following questions : An object is placed in front of a co...

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  5. Answer the following questions : What is the power of a lens ?

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  6. Answer the following questions : What is the unit of power of a lens ...

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  7. Answer the following questions : What is the sign of the power of a...

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  8. Answer the following questions : If there is an increase or decrease ...

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  9. Answer the following questions : If two lenses of focal length f1 and...

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  10. Answer the following questions : Draw a neat labelled diagram to show...

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  11. Answer the following questions : What is cornea ?

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  12. Answer the following questions : What is iris ?

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  13. Answer the following questions : What is pupil ?

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  14. Answer the following questions : What is the use of the pupil in the ...

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  15. Answer the following questions : With reference to the functioning of...

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  16. Answer the following questions : What is the shape and the size of th...

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  17. Answer the following questions : Name the part of the human eye that ...

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  18. Answer the following questions : Which part of the human eye is locat...

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  19. Answer the following questions : What is retina ?

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  20. Answer the following questions : What is the nature of the eye lens a...

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