That's two diffraction gratings, rotated 90 degrees, to each other.
LED colours revealed by a diffraction grating
youtube.com/shorts/OA1IZBUl-…
Can't help thinking there's truth here. Until you respect yourself, you won't respect others.
It doesn't look well. Just sayin'.
A rare sailback shark, which has an unusually large dorsal fin, was first described by scientists in 1973. That was the last record of its existence – until now. newscientist.com/article/249…
It's the thick ones, who think the other person is thick. Good manners are inversely proportional to intellect.
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Did the BBC really get a prestigious university department, to demonstrate how wet wood shavings, don't burn as well as dry ones?
I don't like, follow or understand, football. But from what I perceive, we have a team of women that play like a male rugby team. As opposed to a group of men who play, well, not quite made of the right stuff. Well done Ladies!
AI remembering my conversations, that's good. According my partner, I don't remember loads of conversations.
hey @grok who is the most famous person to block me?
Just before Christmas, I twisted my knee. I've been getting physio advice, to strengthen and heal it. I went to the trauma outpatient department on Friday, I just need to convince them that mending a seventy one year old, who runs 10km in 71 minutes, is worth the investment.
The only 'sure fire' way to make money on the lottery is to own shares in the company.
How can you guarantee a huge payout from any lottery? Take a cue from combinatorics, and perhaps gather a few wealthy pals newscientist.com/article/248…
Isn't that Black Body radiation?
Humans emit a strange glow that extinguishes when we die, scientists discover - BBC Science Focus Magazine apple.news/A_qw1PvR6SOSI1TPK…
Nope, Polycarbonate blocks UVA and UVB. Tinted lenses reduce the visible wavelengths and make them more comfortable, but both block UV.
UV hinterland
bbc.co.uk/news/articles/c365…












