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Question

Heat travels through a vacuum by


A

radiation

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B

convection

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C

conduction

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D

Both (A) and (B)

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Solution

The correct option is A

radiation


Explanation for the correct option

Option (A)

  1. Heat is a type of energy.
  2. There are three types of heat transfer processes: conduction, convection, and radiation.
  3. Radiation is an electromagnetic wave, which is transverse in nature. For a transverse wave, the medium is not necessary to propagate.
  4. Radiation can travel without any medium.

Explanation for the incorrect options

  1. Conduction and convection occur in solids, liquids, and gases (medium is necessary).
  2. Heat can't transfer by conduction and convection without any medium.

Hence, option (A) is correct.


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