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- How to solve this problem- This question has Statement-1 and Statement-2. Of the four choices given after the statements, choose the one that best describes the two statements.Statement-1 : Sky wave signals are used for long distance radio communicat
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This question has Statement-1 and Statement-2. Of the four choices given after the statements, choose the one that best describes the two statements.
Statement-1 : Sky wave signals are used for long distance radio communication. These signals are in general, less stable than ground wave signals.
Statement-2 : The state of ionosphere varies from hour to hour, day to day and season to season.
- Option 1)
Statement-1 is true, statement-2 is false.
- Option 2)
Statement-1 is true, Statement-2 is true, Statement-2 is the correct explanation of Statement-1.
- Option 3)
Statement-1 is true, Statement-2 is true, Statement-2 is not the correct explanation of Statement-1.
- Option 4)
Statement-1 is false, Statement-2 is true .
Answers (1)
As we have learnt,
SKY wave propagation -
These are the wave which are reflected back to earth by ionosphere. These are radio wave of frequency range 2 MHz to 30 MHz .
- wherein
it is used for very long distance radio communication at medium and high frequency.
Sky wave signal are less stable than ground wave signal, due to variation in ionsphere
The state of ionosphere varies with season as were as within day depending on intensity of light
Option 1)
Statement-1 is true, statement-2 is false.
Option 2)
Statement-1 is true, Statement-2 is true, Statement-2 is the correct explanation of Statement-1.
Option 3)
Statement-1 is true, Statement-2 is true, Statement-2 is not the correct explanation of Statement-1.
Option 4)
Statement-1 is false, Statement-2 is true .
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