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Write the relation for the speed of elec...

Write the relation for the speed of electromagnetic wave in terms of the amplitudes of electric and magnetic fields.

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To derive the relation for the speed of electromagnetic waves in terms of the amplitudes of the electric field (E₀) and the magnetic field (B₀), we can follow these steps: ### Step 1: Understand the speed of electromagnetic waves The speed of electromagnetic waves in a vacuum is denoted by \( c \) and is approximately \( 3 \times 10^8 \) m/s. ### Step 2: Recall the relationship between electric and magnetic fields In electromagnetic waves, the electric field (E) and the magnetic field (B) are related to each other. The speed of the wave can be expressed in terms of the amplitudes of these fields. ...
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Knowledge Check

  • Electromagnetic wave consists of periodically oscillating electric and magnetic vectors.

    A
    in mutually perpendicular planes but vibrating with a phase difference of `pi`
    B
    in mulually perpendicular planes but vibrating with a phase difference of `(pi)/(2)`
    C
    in randomly oriented planes but vibrating in phase
    D
    in mutually perpendicular planes but vibrating in phase.
  • Assertion : The electromagnetic wave is transverse in nature Reason : Electromagnetic wave propagates parallel to the direction of electric and magnetic fields.

    A
    If both assertion and reason are true and reason is the correct explanation of assertion
    B
    If both assertion and reason are true but reason is not the correct explanation of assertion
    C
    If assertion is true but reason is false
    D
    If both assertion and reason are false
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