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Name the type of waves which are used for line of sight (LOS) communication. What is the range of their frequencies?
A transmitting antenna at the top of a tower has a height of 20m and the height of the receiving antenna is 45m. Calculate the maximum distance between them for satisfactory communication in LOS mode. (Radius of the Earth `= 6.4 xx 10^(6)` m)

A

ground waves

B

space waves

C

sky waves

D

both (b) & (c)

Text Solution

Verified by Experts

The correct Answer is:
B
Space wave is used for line of sight communication .
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MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-COMMUNICATION SYSTEM-Exercise 1
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  2. When electromagnetic waves enter the ionised layer of ionosphere, then...

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  3. Name the type of waves which are used for line of sight (LOS) communic...

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  4. In space communcation , the information can be passed from on place ...

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  5. What fraction of the surface area of earth can be covered to estab...

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  6. Beyond which frequency, the ionosphere bends any incident electromagne...

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  7. For sky wave propagation of a 10 MHz signal, what should be the minimu...

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

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  9. Fading is the variation in the strength of a signal at a receiver due ...

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  10. In earth's atmosphere for E- layer , the virtual height and critical ...

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  11. If the TV telecast is to cover a radius of 120 km ( Given , the radiu...

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

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  13. Ozone layer above earth's atmosphere will not

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

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  15. Match the following column I and Column II

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

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

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  18. In amplitude modulation, carrier wave frequencies are:

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

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

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