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An observer looks at a tree of height 15...

An observer looks at a tree of height 15 m with a telescope of magnifying power 10.To him,tree appears

A

10 times taller

B

15 times taller

C

10 times neraere

D

15 times nearer.

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MODERN PUBLICATION-UNIT TEST -06-EXERCISE
  1. If the least distance of distinct vision is 25 cm,then a convex lens o...

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  2. The convex lenses of focal lengths 0.3 m and 0.05 m are used to make a...

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  3. An observer looks at a tree of height 15 m with a telescope of magnify...

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  4. Magnifying power of a telescope is m.If the focal length of the eye-pi...

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  5. A fly is sitting on the objective of a telescope pointed to the moon.W...

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  6. A telescpe is focussed on the moon.If a tiny drop of ink falls on its ...

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  7. For observing a cricket match,binocular is prefferred to tererestrial ...

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  8. A reflecting telescope utilizes

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  9. The resolving power of a telescope depends upon

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  10. Large aperture telescopes are used for

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  11. Light has the following wave property:

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  12. Which of the following produces a plane wavefront?

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  13. As a plane wavefront propagates, its radius of curvature

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  14. A plane wavefront is propagating in a medium.Which of the following is...

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  15. Which of the following is a correct statement ?The ray of light

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  16. Though quantum theory of light can explain a number of phenomena obser...

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  17. Hiygens' concept of secondary waves

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  18. Which one off the following phenomena is not explained by Huygens' con...

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  19. Two points are situated at the same distance from a source of light bu...

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  20. One important similarity between sound and light waves in that both

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