Emissitivity of copper - Why are copper heatsinks all shiny? – physics.stackexchange.com

Emissitivity of copper - Why are copper heatsinks all shiny? – physics.stackexchange.com

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This wikipedia article states that emissivity of polished copper is 0.04, and emissivity of oxidized copper is 0.87 - more than 20x of the polished copper. So my question is - why are all copper ...

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