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Yes,they can emit when there is a medium to convey the heat dont you understand.Without changing wavelength to ir and without a medium to transfer to you cant get rid of the heat.
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[–] Melissus ago
Yes,they can emit when there is a medium to convey the heat dont you understand.Without changing wavelength to ir and without a medium to transfer to you cant get rid of the heat.
[–] 11909473? ago
EM and Photon's travel in vacuum!