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How are the magnitudes of the electric a...

How are the magnitudes of the electric and magnetic fields related to the velocity of the electromagnetic wave?

Text Solution

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`E_(0)=cB_(0) or c=(E_(0))/(B_(0))`
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Explore conceptually related problems

(a) An e.m. wave is travelling in a medium with a velocity vecv=vhati .Draw a sketch showing the propagation of the e.m. wave, indicating the direction of the oscillating electric and magentic fields. (b) How are the magnitudes of the electric and magnetic fields related to the velocity of the e.m. wave?

An electromagnetic wave is travelling in a medium with a velocity vecv=vhati . Draw a sketch showing the propagation of the electromagnetic wave, indicating the direction of the oscillatign electric and magnetic fields. (b) How are the magnitudes of the electric and magnetic fields in the electromagnetic wave related to the velocity of the e.m. wave?

Knowledge Check

  • The ratio of contributions made by the electric field and magnetic field component to the intensity of an electromagnetic wave is : ( c = speed of electromagnetic waves)

    A
    `1:1`
    B
    `1: c`
    C
    `1:c^2`
    D
    `c:1`

  • The ratio of contributions made by the electric field and magnetic field components to the intensity of an electromagnetic wave is

    A
    `c:1`
    B
    `c^2:1`
    C
    `1:1`
    D
    `sqrtc:1`

  • The ratio of contributions made by the electric field magnetic field components to the intensity of an electromagnetic wave is

    A
    `C:1`
    B
    `1:1`
    C
    `C^(2):1`
    D
    `sqrt(C):1`

    • Similar Questions

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    Write the relation between the following: (a) Direction of propagation and directions oscillation of the electric and magnetic field vectors in an electromagnetic wave. (b) Velocity of the electormagnetic wave in vacuum and the permeability and permittivity of free space.

    (a) When the oscillating electric and magnetic fields are along the X- and Y-direction respectively (i) point out the direction of propagation of electromagnetic wave, (ii) express the velocity of propagation in terms of the amplitudes of the oscillating electric and magnetic fields. (b) How do you show that an electromagnetic wave carries energy and momentum?

    In electromagnetic wave, if vecE,vecB and vecv are the electric field vector, magnetic field vector and velocity vector of electromagnetic wave, then

    Let vecE , vecB and vecC represent the electric field, magnetic field and velocity of an electromagnetic wave respectively. Their directions, at any instant point along the unit vectors given below in order. Which of the following cannot be true?

    Assertion : The velocity of electromagnetic waves depends on electric and magnetic properties of the medium Reason : Velocity of electromagnetic waves in free space is constant.

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