Multiple choice

The mode of propagation of heat from the sun to earth is

  1. conduction

  2. convection alone

  3. radiation alone

  4. convection and radiation
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Since there is a vacuum between the Earth and the Sun, heat cannot travel by conduction or convection, which require a medium. Radiation is the only way heat can travel through a vacuum.

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