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  1. In a vacuum, all electromagnetic waves have the same

    2. A.

     Velocity
    B.

     Wavelenth
    C.

     Frequency
    D.

     All the above

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    Answer : Option A

    Explanation :

    When traveling in a vacuum, electronic waves from the electromagnetic spectrum all travel at the same speed. Velocity is speed with direction, so they would all travel at the same velocity, relatively speaking. But frequency and wavelength are quite different.

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