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Give the ratio of velocities of light ra...

Give the ratio of velocities of light rays of wave length `4000 overset(@)A` and `8000 overset(@)A` in vacuum.

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R G PUBLICATION-ELECTROMAGNETIC WAVES-EXERCISE
  1. What oscillates in electro magnetic wave.

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  2. Why sky wave are not used in television signals.

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  3. Give the ratio of velocities of light rays of wave length 4000 overset...

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  4. Draw a diagram for a linearly polarised electromagnetic wave, propagat...

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  5. A plane electromagnetic wave of frequency 10MH tranvells in free space...

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  6. What are radio wave? How they propagate?

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  7. What is infrared waves?

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  8. Write about X-rays and how they are used as a dignostic tool in medici...

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  9. The magnetic field in a plane electromagnetic wave is given by By = 3x...

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  10. Why are microwave used in Radar?

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  11. For long distance radio broadeast, we use short wave only. Why?

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  12. Why satellites are used for long distance TV transmission.

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  13. State and explain Maxwell's modification of Ampere's circuital law.

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  14. Draw a diagram of Hertz experiment for producing electromagnetic wave.

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  15. Explain the term ground wave

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  16. Explain the term sky wave

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  17. What is amplitude modulation? Explain with diagram.

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  18. Calculate the peak value of electric and magnetic field produced by a ...

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  19. What is demodulation? Why is satellite communication necessary for TV ...

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  20. What is the source of emission of r-rays.

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