Multiple choice

By which of the following processes do sun rays reach the earth?

  1. radiation

  2. conduction

  3. convection

  4. diffusion

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Sun rays reach Earth through radiation - the transfer of energy through electromagnetic waves across the vacuum of space. Conduction and convection require a medium (solid, liquid, or gas), which doesn't exist in the vacuum between the Sun and Earth. Diffusion is not relevant to solar energy transfer.