Question

multiple choice question
radiation is a type of heat energy transfer that occurs between two objects

when air currents transport the heat
as long as there is a temperature difference between the two
because the objects are touching

Explanation:

• Radiation is a form of heat transfer that occurs through electromagnetic waves. It does not require a medium (like air currents for convection or direct contact for conduction).
• The key factor for radiation is the temperature difference between two objects. Objects at non - absolute zero temperatures emit radiation. The greater the temperature difference, the more significant the net radiation transfer from the hotter to the colder object.
• Option 1 (when air currents transport the heat) describes convection. Option 3 (because the objects are touching) describes conduction.

Answer:

as long as there is a temperature difference between the two