Wouldn’t it be the opposite? Because with nothing to impede the heat dissipation, wouldn’t it dissipate faster instead of slower?
In: Physics
Of the three forms of heat transfer, two require matter to transfer heat: conduction and convection. The last form, blackbody radiation/thermal radiation, transfers much more slowly, but happens independent of matter. So removing as much matter as possible between your heat source and sink significantly reduces the heat transfer that can occur.
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