Multiple choice

Which of the following is the mode of propagation of heat from the sun to the earth?

  1. Conduction

  2. Convection alone

  3. Radiation alone

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

Heat from the Sun reaches Earth through radiation alone - electromagnetic waves that can travel through the vacuum of space. Conduction requires direct contact between materials, which is impossible across empty space. Convection requires a medium (fluid/gas) to circulate, which doesn't exist in the vacuum between Sun and Earth. Therefore, radiation is the sole mode of heat transfer from the Sun to our planet.

Keep practicing — related questions