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  1. The velocity of heat radiation in vacuum is

  2. A.

     Equal to that of light

    B.

     Less than that of light

    C.

     Greater than that of light

    D.

     Equal to that of sound

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    Answer : Option A

    Explanation :

    Electrons are generally responsible for heat conduction. The phonons (vibrations of the nuclei) also play a part, depending on the temperature of the medium. It depends on the specific conductor you’re using. At some point, in a vacuum, the electrons have to be excited enough to spit out photons, which are Electromagnetic radiation, which in a vacuum should go on forever at the speed of light theoretically.


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