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The speed of electromagnetic waves in a ...

The speed of electromagnetic waves in a vacuum is given by :

A

`(1)/(mu_(0) epsilon_(0))`

B

`(1)/(sqrt(mu_(0) epsilon_(0)))`

C

`mu_(0) epsilon_(0)`

D

`sqrt(mu_(0) epsilon_(0))`

Text Solution

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The correct Answer is:
B
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Knowledge Check

  • If c is the speed of electromagnetic waves in vacuum, its speed in a medium of dielectric constant K and relative permeability mu_r is

    A
    `nu = 1/sqrt(mu_r K)`
    B
    `nu = c sqrt(mu_r K)`
    C
    `nu = c/sqrt(mu_r K)`
    D
    `nu = K/sqrt(mu_r c)`

  • The speed of electromagnetic wave in vacuum depends upon the source of radiation

    A
    Increases as we move from `gamma`-rays to radio waves
    B
    Decreases as we move from `gamma`-rays to radio waves
    C
    Is same for all of them
    D
    None of these.

  • The speed of electromagnetic wave in vacuum depends upon the source of radiation

    A
    Increases as we move from `gamma`-rays to radio waves
    B
    Decreases as we move from `gamma`-rays to radio waves
    C
    Is same for all of them
    D
    None of the above.

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