Infra-red, Absorption & Emission Flashcards
1
Q
What is infra-red radiation?
A
The transfer of thermal energy, emitted from hot objects.
2
Q
What is electromagnetic radiation?
A
Radiation that uses waves rather than particles and so can travel where there are no particles e.g. a vacuum e.g. infra-red radiation.
3
Q
What surfaces are good absorbers of infrared radiation?
A
Dark matt surfaces.
4
Q
What surfaces are slow to emit infrared radiation?
A
Light shiny surfaces.
5
Q
What gives off infrared radiation?
A
Everything gives off infrared radiation, however dark and matt surfaces are better than others
6
Q
What is a vacuum?
A
A space with no matter.
7
Q
What surfaces are good reflectors of infrared radiation?
A
Dark, matt (dull).
