Question:
Which of the following is incorrect about sky waves?
Which of the following is incorrect about sky waves?
Updated On: Jun 6, 2024
- Sky waves are not used in long distance communication
- Their propagation takes place by total internal reflection
- Sky waves support the so-called AM band
- The frequency of sky waves ranges typically from 3 MHz to 30 MHz
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The Correct Option is A
Solution and Explanation
In the $MHz$ frequency range from a few $MHz$ upto $30$ to $40\,MHz, $ long distance communication can be achieved by ionosphere reflection of radio waves back towards the earth. This mode of propagation is called sky wave propagation.
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Concepts Used:
Communication Systems
A system that describes the information exchange between two points is called the communication system. The transmission and reception process of information is called communication. The major elements of communication are such as:
- The Transmitter of information
- Channel or medium of communication
- The Receiver of information
Examples Of Communication Systems:
The following are the examples of communication systems:
- Internet
- Public Switched Telephone network
- Intranet and Extranet
- Television
Types Of Communication Systems:
Turning on Signal specification or technology, the communication system is categorized as follows:
- Analog technology communicates data as electronic signals of differing frequencies or amplitude. For instance Broadcast and telephone transmission.
- In Digital technology, the data are created and processed in two states: High (represented as 1) and Low (represented as 0). Also this technology stores and transmits data in the form of 1's and 0's.
Elements of a Communication System:
