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The length of the tube a compound micro...

The length of the tube a compound microscope is 21.5 cm . The focal lengths of the objective and the eyepiece are 1.6 cm and 2.1 cm respectively . If the final image is situated at infinity , then the distance of the object from the objective is

A

3 cm

B

1.7 cm

C

6 cm

D

4.8 cm

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The correct Answer is:
B
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CHHAYA PUBLICATION-OPTICAL INSTRUMENTS-Exercise(Multiple choice questions)
  1. Normal eye cannot see the object nearby from a distance of 25 cm , as

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  2. Ability of the eye to see objects at all distances is called

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  3. The numerical aperture for a human eye is of the order of

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  4. If there had been one eye of the man then

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  5. What type of lens should be used in spectacles for the remedy of myopi...

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  6. A person who can see things most clearly at a distance of 10 cm , requ...

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  7. The least distance of distinct vision of a man is 45 cm. He uses a le...

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  8. The image formed by the objective of a compound microscope is

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  9. To get a magnification from a compound microscope ,

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  10. The length of the tube a compound microscope is 21.5 cm . The focal l...

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  11. The angular magnification of a simple microscope can be increased by

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  12. The length of the tube of a microscope is 14 cm and its magnifying po...

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  13. A Galileo's telescope has an objective of focal length 100 cm and magn...

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  14. In a Galileo's telescope , the inverted image formed by its objective...

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  15. In an astromical telescope , if the focal lengths of the objective an...

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  16. In case of normal focussing of an astronomical telescope the final ima...

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  17. The angular magnification of an astronomical telescope will be maximum...

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  18. If the focal length of the eyepiece of a telescope is doubled, its mag...

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