4 ms·
Okay... why _don't_ they just make hips out of bone, and why _can't_ you just wrap LEDs in blue film?
by D-Coder 6y ago
Okay... why _don't_ they just make hips out of bone, and why _can't_ you just wrap LEDs in blue film?
- dekhn 6y agomodern bone replacement uses cadaver bones, so the answer is "they do". As for LEDs, if you're using a color filter, that's filtering out the vast majority of photons so it's not bright or efficient.
- detaro 6y agoIsn't it with LEDs also that getting a spectrum that has blue you could filter is about as hard as getting just blue? (e.g. white LEDs are some form of blue/UV with an extra fluorescent layer, and from a (simple) red LED you can't get blue by filtering?)