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JAMB Physics 1981 Question 11

Question 11

Heat Transfer

Heat may be transferred by conduction, convection and radiation. By which of these methods does heat travel through vacuum?

  1. A.Conduction only
  2. B.Convection only
  3. C.Radiation only
  4. D.All three methods
  5. E.None of these methods.
Show the answer and explanation

Answer: C (Radiation only)

Explanation

Conduction and convection need particles of matter. Only radiation (electromagnetic waves) crosses a vacuum.