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In a compound microscope cross-wires are...

In a compound microscope cross-wires are fixed at the point

A

Where the image is formed by the objective

B

Where the image is formed by the eye-piece

C

Where the focal point of the objective lies

D

Where the focal point of the eye-piece lies

Text Solution

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The correct Answer is:
A
Cross wire arrangement is used to make measurements.
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ERRORLESS-RAY OPTICS-NCERT BASED QUESTIONS ( Microscope and Telescope)
  1. The magnifying power of a telescope can be increased

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  2. In a compound microscope cross-wires are fixed at the point

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  3. The magnification produced by the objective of a compound microscope i...

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  4. When the object is self-luminous, the resolving power of a microscope ...

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  5. In order to increase the magnifying power of a compound microscope

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  6. The objective lens of a compound microscope produces magnification of ...

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  7. Least distance of distinct vision is 25 cm . Magnifying power of simpl...

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  8. Magnification of a compound microscope is 30. Focal length of eye- pie...

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  9. The focal lengths of the objective and of the eye-piece of a compound ...

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  10. The length of the compound microscope is 14 cm. The magnifying power f...

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  11. If the focal length of objective and eye lens are 1.2 cm and 3 cm resp...

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  12. The head lights of a jeep are 1.2 m apart. If the pupil of the eye of ...

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  13. A compound microscope has an eye piece of focal length 10 cm and an ob...

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  14. Two points separated by a distance of 0.1 mm can just be resolved in a...

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  15. In a compound microscope, the focal length of the objective and the ey...

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  16. The magnifying power of a telescope is 9. When it is adjusted for para...

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  17. At Kavalur in India, the astronomers using a telescope whose objective...

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  18. For a telescope to have large resolving power the

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  19. A Galileo telescope has an objective of focal length 100cm and magnif...

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  20. To increase both the resolving power and magnifying power of a telecsc...

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