Which of the Following Statements About Thermal Radiation Is Always

Multiple Choice

Which of the following statements about thermal radiation is always true?

A) All the light emitted by hot object has higher energy than the light emitted by a cooler object.
B) A hot object emits more radiation per unit surface area than a cool object.
C) A hot object produces more total infrared emission than a cooler object.
D) A cold object produces more total infrared and radio emission per unit surface area than a hot object.