Comment by addaon
15 hours ago
> invisible to the human eye
Also unclear how the light would be invisible to the human eye, given that the human eye has single-photon sensitivity smack in the middle of that range.
15 hours ago
> invisible to the human eye
Also unclear how the light would be invisible to the human eye, given that the human eye has single-photon sensitivity smack in the middle of that range.
I noticed that too and I agree that sounds wrong - I suspect the authors of the popsci phys article were being hasty and wrote poorly, using "invisible" to refer to the intensity, separate from the frequency (even though it's misleadingly mentioned immediately after).
Or maybe they're just wrong and didn't realize that 500 nm is visible light - that's possible too.