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The air of earth's atmosphere responsi...

The air of earth's atmosphere responsible for absorbing a large portion of ultraviolet radiations by the sun is

A

Ionosphere

B

Ozone layer

C

Troposphere

D

Thermosphere

Text Solution

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The correct Answer is:
B
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Harmful ultraviolet radiations from the sun causes:

Ultraviolet radiations is absorbed by:

Which one of the following gases present in the upper atmosphere cuts off a major portion of ultraviolet radiation of the sun from reaching the earth?

A : Atmosphere plays an important role in maintaining the heat balance on earth. R : Atmosphere absorbs a portion of electromagnetic readiation coming from the sun and transmits near UV, visible and near IR radiation.

NIKITA PUBLICATION-COMMUNICATION SYSTEMS-Multiple Choice Questions (Space communication )
  1. The air of earth's atmosphere responsible for absorbing a large port...

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  2. Height of ionosphere is … km from ground surface.

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  3. One way communication is called

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  4. The region that contains free electrons, negative ions and positive io...

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  5. Electromagnetic waves of frequency ……. are reflected from ionosphere.

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  6. Because of tilting, which waves finally disappear?

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  7. Temperature of troposphere decreases ….. ^(@)C//k.m.

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  8. When an electromagnetic wave entres an ionised layer of enrth's aatmos...

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  9. In which of the region of earth's atmosphere temperature decreases wit...

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  10. In earth's atmosphere for F(1)-layer , the virutal height and critic...

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  11. In earth's atmosphere , for F(2) - layer, the virtual height and crit...

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  12. As the height of satellite orbit gets lower, the speed of the satel...

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  13. An electron oscillating with a frequency of 3xx10^6 Hz, would generate...

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  14. If three wave no atmosphere, the average temperature on the surface of...

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  15. When an electromagnetic waves enter the ionised layer of ionosphare, ...

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  16. Ultraviolet spectrum can be studied by using a

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  17. When electromagnetic waves enter the ionised layer of ionosphere, then...

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  18. The absorption of radiowaves by the atmosphere depends upon

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  19. The ozone layer in the atmosphere absorbs

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  20. Out of the following the radiation with lowest frequency is

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