energy resources and energy transfers

Question 1

what is thermal conduction?

Answer 1

Thermal conduction is the process where vibrating particles transfer energy from their kinetic energy store to the kinetic energy store of their neighbouring particles.

Question 2

what is thermal radiation?

Answer 2

1. Thermal radiation is the emission of electromagnetic waves from all matter. It is also called infrared radiation.
2. Matter that is hotter than its surroundings emits more infrared radiation than it absorbs and visa versa.

Question 3

describe how different surfaces emit and absorb radiation better than others?

Answer 3

1. Black surfaces are better at absorbing and emitting radiation than white surfaces.
2. Matt surfaces are better at absorbing and emitting radiation than shiny surfaces.