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If the focal length of the objective len...

If the focal length of the objective lens is increased then

A

Magnifying power of the microscope will increase but that of telescope will decrease

B

Magnifying power of microscope and telescope both will increase

C

Magnifying power of microscope and telescope both will decrease

D

Magnifying power of microscope will decrease but that of telescope will increase

Text Solution

Verified by Experts

The correct Answer is:
D
A microscope consists of lens of small focal lengths . A telescope consists of objective lens of large focal length.
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A2Z-GEOMETRICAL OPTICS-Optical Instruments
  1. The focal length of objective and eye lens of a microscope are 4 cm an...

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  2. The magnifying power of a microscope with an objective of 5 mm focal l...

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  3. If the focal length of the objective lens is increased then

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  4. The focal length of the objective and the eye piece of a compound micr...

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

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  6. In a compound microscope, the focal lengths of two lenses are 1.5 cm a...

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  7. A simple telescope, consisting of an objective of focal length 60 cm a...

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  8. The diameter of the objective of the telescope is 0.1 metre and wavel...

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  9. The focal length of objective and eye lens of a astronomical telescope...

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  10. An astronomical telescope has an angular magnification of magnitude 5 ...

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  11. In Galilean telescope, if the powers of an objective and eye lens are ...

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  12. The magnifying power of an astronomical telescope is 8 and the distanc...

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  13. An opera glass (Galilean telescope ) measures 9cm from the objective t...

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  14. When a telescope is adjusted for parallel light, the distance of the o...

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  15. Two convex lenses of focal lengths 0.3m and 0.05m are used to make a t...

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  16. The diameter of the objective lens of a telescope is 5.0m and wavelen...

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  17. A Galilean telescope has objective and eye- piece of focal lengths 200...

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  18. An astronomical telescope of ten-fold angular magnification has a leng...

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  19. The focal lengths of the lenses of an astronomical telescope are 50cm ...

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  20. Sun's diameter is 1.4 xx10^(9)m and its distance from the earth is 10^...

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