einfach_orangensaft@feddit.de to NonCredibleDefense@sh.itjust.worksEnglish · 9 months agoThe Math would add upfeddit.deimagemessage-square159fedilinkarrow-up1414arrow-down121
arrow-up1393arrow-down1imageThe Math would add upfeddit.deeinfach_orangensaft@feddit.de to NonCredibleDefense@sh.itjust.worksEnglish · 9 months agomessage-square159fedilink
minus-squarenicoweio@lemmy.worldlinkfedilinkEnglisharrow-up2·9 months agoI’m not sure about the easy-to-show part, but take a look at the Brightness Theorem / Conservation of https://en.wikipedia.org/wiki/Etendue if you want to learn more.
minus-squareRedjard@lemmy.dbzer0.comlinkfedilinkEnglisharrow-up1·9 months agoThe easy to show part was the second sentence of my comment. This is really useful physics trivia, because the basic truth is easy to show from a simple law, but the detailed explanations go quite in-depth. With lenses, you trade bewteen angular accuracy and light density. For a challenge, try it with LEDs. Where do you find the source “temperature”, you can get from focusing an LEDs light?
I’m not sure about the easy-to-show part, but take a look at the Brightness Theorem / Conservation of https://en.wikipedia.org/wiki/Etendue if you want to learn more.
The easy to show part was the second sentence of my comment.
This is really useful physics trivia, because the basic truth is easy to show from a simple law, but the detailed explanations go quite in-depth.
With lenses, you trade bewteen angular accuracy and light density.
For a challenge, try it with LEDs. Where do you find the source “temperature”, you can get from focusing an LEDs light?