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The electromagnetic radiations are in de...

The electromagnetic radiations are in descending order of wavelength in the following sequence

A

infra red waves, radio waves X-rays visible light rays

B

radio-waves, infra-red waves, visible, X-rays

C

radio waves, visible light, infra-red waves, X-rays

D

X-rays, visible light, infra-red wave, radiowaves

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The correct Answer is:
B
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RESONANCE-ELECTRO MAGNETIC WAVES-Exercise 3
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  2. Write the mathmatical equation of Ampere-maxwell law.

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  3. Identify the constituent radiations of electromagnetic spectrum which ...

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  5. Which of the following are not electromagnetic waves ?

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  7. The frequency of a light wave in a material is 2xx10^(14)Hz and wavele...

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  8. The electric and magnetic field of an electromagnetic wave is

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  9. The velocity of electromagnetic radiatior in a medium of permittivity ...

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  10. Which of the following statement is false for the properties of electr...

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  11. The electric field on an electromagnetic wave in free space is given b...

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  12. The velocity of all radiowaves in free space is 3xx10^(8),//s, the fre...

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  13. Which of these statement is false:

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  14. Infrared spectrum lies between

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  15. A man can take pictures of those objects which are not fully visible t...

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  16. The electromagnetic radiations are in descending order of wavelength i...

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  17. Maxwell's equations describe the fundamental laws of

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  18. Heat radiations propagate with the speed of

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  19. The curve drawn between velocity and frequency of a photon in vacuum w...

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  20. Which rays are not the portion of electro-magnetic spectrum?

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