Heat transfer mode definition: identify radiation The process of heat transfer from a hotter body to a colder body that travels in straight lines and does not require or disturb the intervening medium is called what? Choose the correct truth value for the given statement.

Concept/Approach
Heat can be transferred by conduction (requires material contact), convection (requires a fluid), and radiation (electromagnetic waves that can travel through vacuum).

Why the statement is correct
Radiative transfer proceeds in straight-line paths from a hot surface to a cooler one and does not require an intervening medium; it can occur through vacuum. Any intervening medium may absorb/reflect/emissively participate, but radiation itself does not require the medium.

Common pitfalls

• Confusing radiation with convection; convection needs a moving fluid.
• Assuming radiation needs air; it does not.

Final Answer
True