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The waves that are bent down by the iono...

The waves that are bent down by the ionosphere are

A

grund waves

B

surface waves

C

space waves

D

sky waves

Text Solution

Verified by Experts

The correct Answer is:
D
The waves that are bent down by the ionosphere are called sky waves.
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NCERT FINGERTIPS-COMMUNITCATION SYSTEMS-Propagation Of Electromagnetic Waves
  1. The skip zone in radio wave trasmission is that range where

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  2. Which one of the following statements is wrong?

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  3. The waves that are bent down by the ionosphere are

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  4. The maximum line-of -sight distance d(M) between two antennas having h...

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  5. Frequencies in the UHF range normally propagate by means of:

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  6. If the whole earth is to be connected by LOS communication using spac...

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  7. A ground receiver in line-of-sight communication cannot receive direct...

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  8. Which of the following modes is used for line of sight

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  9. Through which mode of propagation, the radio waves can be sent from on...

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  10. Which of the following frequencies will be suitable for beyond the hor...

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  11. A TV transmitting antenna is 81 m tall. How much service area it can c...

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  12. A transmitting antenna at the top of the tower has a height 18 m and t...

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  13. A transmitting antenna of height 20 m and the receiving antenna of hei...

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  14. A TV transmission tower of antenna is at a height of 20 m. How much se...

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  15. By what percentage will the transmission range of a T.V. tower be affe...

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  16. A TV transmission tower has a height of 240 m. Signals broadcast from ...

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  17. A fax message is to be sent from Delhi to Washington via a geostationa...

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  18. A 50MHz sky wave takes 4.04 ms to reach a receiver via retransmission ...

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  19. What should be the length of the dipole antenna for a carrier wave of ...

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  20. A radio can tune to any station to 7.3 MHz to 12 MHz band. The corre...

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