- cross-posted to:
- videos@lemmy.world
- cross-posted to:
- videos@lemmy.world
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.
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