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Speed of electromagnetic waves in vacuum...

Speed of electromagnetic waves in vacuum,

A

depends on type of source.

B

increases from `gamma` - rays to radio waves.

C

decreases from `gamma` - rays to radio waves.

D

is same for all the parts of electromagnetic spectrum.

Text Solution

Verified by Experts

The correct Answer is:
D
It is same and equal to `C=3xx10^(8)m//s`.
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KUMAR PRAKASHAN-ELECTROMAGNETIC WAVES-SECTION D MULTIPLE CHOICE QUESTIONS (MCQs)
  1. Which of the following law is represented by equation given by Maxwell...

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  2. If electric field in electromagnetic wave propagating along north is v...

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  3. Speed of electromagnetic waves in vacuum,

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  4. In one complete cycle, which field's average value is zero in the prop...

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  5. Unit of permittivity is …….

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  6. Electric field in one electromagnetic wave, propagating in vacuum is E...

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  7. Electric field of one plane progresive electromagnetic wave is E(Z)=10...

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  8. Electromagnetic radiation of intensity I is made incident normally on ...

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  9. What is the order of radiation pressure of visible light in Nm^(-2) ?

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  10. If E and B are respectively values of electric and magnetic fields, th...

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  11. Relation of amplitude of corelate of electric and magnetic field is ……...

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  12. Using B(0)=mu(0)H(0) formula find ratio of (E(0))/(H(0)) for plane ele...

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  13. For the electromagnetic waves propagating in the X - direction, oscill...

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  14. The direction of electromagnetic wave is in the direction of

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  15. Speed of electromagnetic wave in a medium of in(r )=1.3 and mu(r )=2.1...

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  16. Two opposite charaged particles oscillate about their mean equilibrium...

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  17. The frequency of na electromagnetic wave in free space is 2 MHz. When ...

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  18. Dielectric constnat of air is 1.005 and velocity of electromagnetic wa...

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  19. Frequency of electromagnetic wave is 25MHz. The value of electric fiel...

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  20. Values of mu(r ) and in(0) are respectively 2 NA^(-2) and 8C^(2)N^(-1)...

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