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CHETANA PUBLICATION-ELECTROMAGNETIC WAVES AND COMMUNICATON SYSTEM-EXERCISE
- What do you mean by EM spectrum?
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- State the different types of EM waves in the order of decreasing wavel...
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- Why are microwaves used in radar?
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- Why can light waves travel in vacuum whereas sound wave cannot?
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- Name the most harmful radiation entering the earth's atmosphere from t...
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- What are radio waves? Give its two uses
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- What are ultraviolet rays? Give its two uses.
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- State a few properties and uses of gamma-rays ?
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- State a few properties and uses of X-rays?
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- State a few properties and uses of the ultraviolet rays.
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- State a few properties and uses of Infrared rays
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- State a few properties of visible light.
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- State a few properties and uses of Microwaves?
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- State a few properties and uses of Radiowaves?
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- Explain wavelength and frequencies ranges of different regionsin the s...
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- Write a short note on Earth's atmosphere?
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- Write notes on: Ground wave propagation
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- Write notes on: Sky wave propagation
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- Write notes on: Space wave propagation
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- Explain the term Critical frequency
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