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Ozone layer above earth's atmosphere wil...

Ozone layer above earth's atmosphere will not

A

prevent infrared radiations from sun reaching on earth

B

prevent infrared radiations originated from earth from escaping earth's atmosphere

C

prevent ultraviolet rays from sun

D

reflect back radiowaves

Text Solution

Verified by Experts

The correct Answer is:
D
Ozone layer will absorb UV rays, reflects the infrared radiation and does not reflected back radiowaves .
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MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-COMMUNICATION SYSTEM-Exercise 1
  1. If the TV telecast is to cover a radius of 120 km ( Given , the radiu...

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  2. Space wave propagation is used in (a) microwave communication (b) ...

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  3. Ozone layer above earth's atmosphere will not

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  4. The air of earth's atmosphere responsible for absorbing a large port...

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  5. Match the following column I and Column II

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  6. A radiowave that travels in a straight line from the transmitting ante...

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  7. In process of amplitude modulation of signal to be transmitted . S...

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  8. In amplitude modulation, carrier wave frequencies are:

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  9. In a detector, output circuit consists of R = 10kOmega and C = 100 p F...

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  10. For efficient transmission, transmitting antenna has length comparable...

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  11. A radio transmitter radiates 1 kW power at a wavelength 198.6 m. How m...

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  12. A 100 m long anteena is mounted on a 500 m tall building. The complex ...

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  13. A 1000 kHz carrier wave is modulated by an audio signal of frequency r...

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  14. In frequency modulation

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  15. In frequency modulated wave

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  16. A speech signal of 3 kHz is used to modulate a carrier signal of frequ...

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  17. A transducer , in communication system in a device that

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  18. In an amplitude modulated wave , the maximum amplitude is 10V and th...

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  19. Which of the following is not transducer?

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  20. An oscillator is producing FM waves of requency 2kHz with a variation ...

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