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made a telescope to observe distant star...

_________ made a telescope to observe distant stars.

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The ____________ invented telescope was similar to the astronomical telescope.

__________ is an optical instrument used to see distant objects.

A telescope has an objective of diameter 60 cm.The focal lengths of the objective and eyepiece are 2.0 m and 1.0 cm respectively. The telescope is directed to view two distant almost point sources of light, (e.g., two stars of a binary) The sources are roughly at the same distance = ( =10^4 light year) along the line of sight but are separated transverse to the line of sight by a distance of 10^10 m. Will the telescope resolve the two objects i.e. will it see two distant stars?

________ made first observation of mineral nutrition.

A small telescope has an objective lens of focal length 140 cm and eyepiece of focal length 5.0 cm. What is the magnifying power of the telescope for viewing distant objects when (a) the telescope is in normal adjustment and (b) the final image is formed at least distance of distinct vision ?

Assume that light of wavelength 6000A is coming from a star. What is the limit of resolution of a telescope whose objective has a diameter of 100 inch?

A small telescope has an objective lens of focal length 140 cm and eyepiece of focal length 5.0 cm. What is the megniftying power of the telescope for viewing distant objects when (a) the telescope is in normal adjustment (i.e, when the final image is at infinity ) (b) the final image is formed at the least distance of distinct vision (25cm) ?

A small telescope has an objective lens of focal length 150 cm and eyepiece of focal length 5 cm. What is the magnifying power of the telescope for viewing distant object in normal adjustment? If this telescope is used to view a 100 m tall Also tower 3 km away, what is the height of the image of the tower formed by the objective lens?

SURA PUBLICATION-OPTICS-ADDITIONAL QUESTIONS & ANSWER (Fill in the blanks (Covers whole unit))
  1. Magnification power of microscope has to times more magnification po...

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  2. Compound microscope has to times more magnification power than simpl...

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  3. A microscope is used to measure very small length with high degree of...

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  4. The least count of a travelling microscope is

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

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  6. The first telescope was invented by in 1608.

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  7. made a telescope to observe distant stars.

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  8. The invented telescope was similar to the astronomical telescope.

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  9. A microscope works based on the principle of vernier.

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  10. The minimum distance required to see the objects distinctly without st...

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  11. is know as long sightedness.

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  12. Aged person cannot see the nearby objects . It is called .

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  13. mirrors are used in relfecting telescope.

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  14. Galilean telescope, Keplerian telescope are some of the example of te...

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

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  16. The energy of incident and scattered beam of light are not same, that ...

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  17. Mie scattering is caused by , and .

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  18. The scattering of light contains additional frequencies than incident ...

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  19. When light passing through Reflected wave will be parallel in convex ...

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  20. The band of colours is termed as .

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