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The correct arrangement of colours in th...

The correct arrangement of colours in the descending order of their wavelength is

A

yellow,violet,green,orange

B

orange,yellow, green,violet

C

violet, green ,yellow, orange,

D

yellow, green , orange, violet

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The correct Answer is:
b
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PRADEEP-ELECTROMAGNETIC WAVES-Exercise
  1. which of the following in not true for electromagnetic waves ?

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  2. The amplitude of an electromagnetic wave A is a and of another B is 3a...

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  3. The correct arrangement of colours in the descending order of their wa...

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  4. An electromagnetic wave consists of oscillating electric and magnetic ...

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  5. Which of the following electromagnetic waves has smaller wavelength ?

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  6. The waves used in telecommunication are

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  7. .........was considered as a father of wireless communication.

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  8. A current which comes into play in a region where the electric field i...

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  9. The electric lines of force............. From continuous closed path w...

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  10. The nature of electromagnetic wave is-

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  11. The velocity of electromagnetic waves in free space can be given by re...

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  12. The velocity of electromagnetic waves depends entirely on the ...........

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  13. The force exerted by electromagnetic wave on unit area of the surface ...

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  14. If a portion of elctromagnetic wave of energy U is propaging with spee...

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  15. The cross product vecExxvecB (where vecE =electric field vector and ve...

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  16. The ratio of omega//k for a travelling wave (where omega is the angula...

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  17. The orderly distrubution of electromagnetic radiations according to th...

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  18. The electromagnetic wave is of frequency range from 5xx10^5 Hz to 10^...

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  19. The ultraviolet rays were discovered by .......... in ..........

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  20. The electromagnetic waves of frequency range 3xx10^18 to 5xx10^22 are ...

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