Question

Which of the following is the best description of radiation? A. the process by which a liquid is converted to its vapor phase by heating the liquid B. the transmission of heat through a medium without the motion of the medium C. heat transfer in a gas or liquid by the circulation of currents from one region to another D. the emission of energy in the form of rays or waves

Answer 1

D. The emission of energy in the form of rays or waves

Answer 2

D; Radiation is the emission of energy through rays and waves, it doesn't have to do with heat transfer and vapor.