Andrey Stoev wrote:
In the same
Physics 101 class they teach that black painted objects radiate heat
better - one reason why the anode of a tube and also heatsinks are black.
Sort of true, but is "blackness" at near infrared, for the valve, and
far infrared, for heat sinks (also near infrared for solar heat
absorption). Theoretically, one could have an object that was a very
efficient radiator but was optically white.
I think it is generally black pigments, that are broadband black. Black
dyes may well be transparent at infrared.
--
David Woolley
Emails are not formal business letters, whatever businesses may want.
RFC1855 says there should be an address here, but, in a world of spam,
that is no longer good advice, as archive address hiding may not work.
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