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What is ozone layer ? Give its importanc...

What is ozone layer ? Give its importance.

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Ozone layer : A layer of ozone `(O_(3))` gas at a height between 15 km to 30 km in stratosphere formed by dissociation of oxygen by the ultraviolet radiation of the sun is known as ozone layer.
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BETTER CHOICE PUBLICATION-PRINCIPLES OF COMMUNICATION -SHORT ANSWER TYPE QUESTIONS
  1. What is the need for modulation ?

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  2. What is modulation ?

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  3. What is ozone layer ? Give its importance.

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  4. Answer the following questions The small ozone layer on top of the s...

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  5. What is space wave propagation ? Why is it limited upto small distance...

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  6. What is the need for modulation ?

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  7. Why audio signals cannotbe transmitted directly into space ?

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  8. Explain basic elements of communication system with the help of block ...

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  9. What are the limitations of amplitude modulation ?

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  10. Give one difference between point to point mode of communication and b...

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  11. Why is ground wave propagation not suitable for high frequency ?

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  12. Explain the term ground waves propagation of radio-waves.

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  13. Explain why sky wave propagation is not possible for high frequency ra...

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  14. What is space wave propagation ? Give one example of communication sys...

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  15. Write any two factors, which justify the need of modulation for the tr...

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  16. Explain space wave propagation.

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  17. What do you mean by medium wave band and short wave band ?

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  18. Define frequency modulation.

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  19. What do you mean by medium wave band and short wave band ?

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  20. What is remote sensing? WHat are the uses of remote sensing satellites...

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