Infra-red, Absorption & Emission Flashcards

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1
Q

What is infra-red radiation?

A

The transfer of thermal energy, emitted from hot objects.

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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.

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3
Q

What surfaces are good absorbers of infrared radiation?

A

Dark matt surfaces.

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4
Q

What surfaces are slow to emit infrared radiation?

A

Light shiny surfaces.

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5
Q

What gives off infrared radiation?

A

Everything gives off infrared radiation, however dark and matt surfaces are better than others

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6
Q

What is a vacuum?

A

A space with no matter.

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7
Q

What surfaces are good reflectors of infrared radiation?

A

Dark, matt (dull).

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