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In order to decrease the magnifying powe...

In order to decrease the magnifying power of a telescope

A

The focal powers of the objective and the eye-piece should be large

B

Objective should have small focal length and the eye-piece large

C

Both should have large focal length

D

The objective should have large focal length and the eye-piece should have small

Text Solution

Verified by Experts

The correct Answer is:
D
`M=(F_(0))/(f_(theta))`
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RESONANCE ENGLISH-GEOMETRICAL OPTICS-Exercise
  1. A light waves travels from glass to water. The refractive index for gl...

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  2. When a beam of light goes from denser medium (m(d)) to rarer medium (m...

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  3. The image for the converging beam after refraction through the curved ...

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  4. A thin linear object of size 1mm is kept along the principal axis of a...

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  5. A medium has nv = 1.56, nr=1.44. Then its dispersive power is:

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

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  7. A convex lens of focal length A and a concave lens of focal length B a...

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  8. Two convex lens, of focal length 25 cm and 20 cm respectively are put ...

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  9. When the distance between the object and the screen is more than 4 f....

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  10. A plano-convex lens is made of glass of refractive index 1.5. The radi...

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

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  12. In order to decrease the magnifying power of a telescope

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

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  14. The numerical value of the length of Galilean telescope for normal vis...

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  15. The magnifying power of compound microscope in terms of the magnificat...

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  16. In a simple microscope, if the final image is located at infinity then...

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  17. An achromatic combination of lenses is formed by joining

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  18. In a simple microscope, if the final image is located at 25 cm from th...

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  19. STATEMENT -1: There exists two angles of incidence for the same deviat...

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  20. STATEMENT-1: A lens has two principal focal lengths which may be diffe...

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