- cross-posted to:
- science@lemmy.world
- videos@lemmy.world
- videos@hexbear.net
- cross-posted to:
- science@lemmy.world
- videos@lemmy.world
- videos@hexbear.net
The blue LED was supposed to be impossible—until a young engineer proposed a moonshot idea.
The blue LED was supposed to be impossible—until a young engineer proposed a moonshot idea.
Making blue LEDs is easy. Just make a red one, then move towards it really fast.
Doppler effect?
https://en.m.wikipedia.org/wiki/Redshift#Blueshift
Essentially yes
Yeah but it only works if the source is moving towards the observer