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If the focal length of the objective len...

If the focal length of the objective lens is increased then

A

microscope will increase but that of telescope decrease.

B

microscope and telescope both will increase.

C

microscope and telescope both will decrease.

D

microscope will decrease but that of telescope increase.

Text Solution

Verified by Experts

The correct Answer is:
D
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MOTION-RAY OPTICS-Exercise-3
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  2. The angle of a prism is A . One of its refracting surfaces is silvered...

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

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  4. The refracting angle of a prism is A, and refractive index of the mate...

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  5. Two identical thin planoconvex glass lenses (refractive index 1.5) eac...

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  6. In an astronomical telescope in normal adjustment a straight black lin...

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  7. A lens has one concave surface of R(1) = 2 m and convex surface with R...

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  8. A compound microscope having f(0) = 7 mm, f(e) = 20 mm and distance be...

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  9. For and EMWave . E= E(0) sin 12 xx 10^(6) [X -2 xx 10^(8) t ] (N...

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  10. The angle of incidence for a ray of light at a refracting surface of a...

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  11. The ratio of resolving powers of an optical microscope for two wavelen...

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  12. A beam of light from a source L is incident normally on a plane mirror...

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  13. A thin prism having refracting angle 10^(@) is made of glass of refrac...

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  14. The refractive index of the material of a prism is sqrt(2) and the ang...

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  15. An object is placed at a distance of 40 cm from a concave mirrorr of f...

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  16. A fish looking up through the water sees the outside world contained i...

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  17. Two point white dots are 1mm apart on a black paper. They are viewed b...

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  18. A thin glass (refractive index 1.5) lens has optical power of -5D in a...

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  19. A light ray is incident perpendicularly to one face of a 90^circ prism...

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  20. The refractive index of a glass is 1.520 for red light and 1.525 for b...

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