4 ms·
Do any of them say it must be re-radiated omni-directionally as infra-red light?
by stevejones 11y ago
Do any of them say it must be re-radiated omni-directionally as infra-red light?
- marcosdumay 11y agoPretty much. You can make it cooler than infra-red light (like microwaves), and you can irradiate for half a sphere, or even a bit less. But that's all.