3 ms·
> Then you draw a vacuum and heat the cavity What are you heating if it's a vacuum? How can you heat nothing?
by jahnu 10y ago
> Then you draw a vacuum and heat the cavity
What are you heating if it's a vacuum?
How can you heat nothing?
- TeMPOraL 10y agoYou're measuring radiative heat, which indeed exists for most of its time in nothing. I guess that the idea of GP is that you could make the heating block arbitrarily big (say, size of the universe) and have it dump all its radiative heat into that cavity.
- jahnu 10y agoI see. Thanks. The difficulty here is people don't often specify if they mean heat in the form of kinetic energy or radiation. Much like how people say things like "releasing energy" without specifying the form of energy.