A microwave oven causes water molecules in a cup to vibrate faster is an example of the transfer of thermal energy by radiation, therefore the correct option is A.
What is thermal radiation?
Thermal radiation is a type of thermal energy produced by the propagation of electromagnetic waves which is produced by the thermal motion of the particles.
Some other examples of thermal radiation are as follows
The heat energy emitted by the boiler furnace.
The thermal energy emitted from the sun is a form of solar radiation.
The microwave radiation is generated from the microwave oven.
A microwave oven causes water molecules in a cup to vibrate
faster represents thermal energy transfer by radiation.
Learn more about thermal radiation
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