Question

Which investigation shows the transfer of heat energy in the absence of matter?

Using particle movement through a solid to investigate conduction
Using particle movement through a solid to investigate conduction

Using particles in space colliding to investigate conduction
Using particles in space colliding to investigate conduction

Using electromagnetic waves to investigate radiation
Using electromagnetic waves to investigate radiation

Using a current through fluid to investigate radiation

Answer 1

The investigation that shows the transfer of heat energy in the absence of matter is:

**Using electromagnetic waves to investigate radiation.**

This is because radiation involves the transfer of heat energy through electromagnetic waves, which can occur in a vacuum where there is no matter present. In contrast, conduction requires a medium (solid, liquid, or gas) for heat transfer, and the other options mentioned involve matter in some form.