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Unilorin Post-UTME Physics 2024 (Model questions) Question 4

Question 4

Heat Transfer

Which of the following is the most effective method of heat transfer through a vacuum?

  1. A.radiation
  2. B.conduction
  3. C.convection
  4. D.conduction and convection
Show the answer and explanation

Answer: A (radiation)

Explanation

Conduction and convection need particles of a medium. Radiation travels as electromagnetic waves, so it is the only way heat crosses a vacuum.