4
AssignmentMultiple Choice

Heat Transfer

Question 4 • Crowley Credit Recovery Physics A

Which statement accurately describes radiation?

Answer
A
Radiation needs matter to transfer thermal energy.
B
Thermal energy is transferred by electromagnetic waves.
C
Ironing a shirt to take out wrinkles is an example of radiation.

Explanation

Radiation transfers thermal energy through electromagnetic waves, such as infrared waves, and does not require matter to travel. Ironing wrinkles transfers heat mainly by direct contact, which is conduction, so choice C is not correct. The accurate statement is that thermal energy is transferred by electromagnetic waves.

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