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To increase the magnification of the tel...

To increase the magnification of the telescope, the focal length of the __________

A

Objective lens is small and eye lens is large

B

Objective lens is large and eye lens is small

C

Objective lens and eye lens are small

D

Objective lens and eye lens are large

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The correct Answer is:
B
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SURA PUBLICATION-OPTICS-ADDITIONAL QUESTIONS & ANSWER (Choose the Correct Answer)
  1. Image formed in simple microscope is .

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  2. Objective lens of telescope is of .

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  3. Presbyobia is corrected by .

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  4. To increase the magnification of the telescope, the focal length of th...

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  5. Among visible light, has the lowest wavelength.

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  6. The second law of refraction is also known as .

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  7. is an optical instrument used to see distant objects.

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  8. The speed of light in vaccum is ms^(-1).

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  9. Light is characterized by and frequency.

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  10. The ratio of speed of light in vaccum to the speed of light medium is ...

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  11. lenses are used as eye lens of 'Galilean Telescope'

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  12. Power of accommodation is achieved by changing the of the eye lens.

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  13. The refractive index of a medium is dependent on the .

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  14. scattering is responsible for the white appearance of the clouds.

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  15. The spectral lines having frequency equal to the incident ray frequenc...

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  16. If one of the focus of a bi-covnex lens is plane, it is known as a .

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  17. lenses are used in camera lenses.

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  18. The defect of myopia can be corrected by using .

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  19. When an object is placed at infinity a is formed at the focus in conc...

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  20. Where should an object be placed on the axis of a convex lens of focal...

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