Question

of heat transfer does not require a medium and can transfer energy through a vacuum, such as from the sun to earth?
conduction
convection
advection
radiation
clear all

Explanation:

To determine the correct answer, we analyze each heat transfer method:

• Conduction: Requires direct contact between particles (e.g., heat through a metal rod).
• Convection: Requires a fluid (liquid/gas) to transfer heat via movement (e.g., air currents).
• Advection: A type of convection involving bulk fluid movement (still needs a medium).
• Radiation: Transfers heat via electromagnetic waves (e.g., sunlight), no medium required.

Since the Sun’s heat reaches Earth through a vacuum (no medium), radiation is the correct method.

Answer:

Radiation (the option labeled "Radiation" with the radio button)