Technology

58144 readers

4427 users here now

This is a most excellent place for technology news and articles.

Our Rules

Follow the lemmy.world rules.
Only tech related content.
Be excellent to each another!
Mod approved content bots can post up to 10 articles per day.
Threads asking for personal tech support may be deleted.
Politics threads may be removed.
No memes allowed as posts, OK to post as comments.
Only approved bots from the list below, to ask if your bot can be added please contact us.
Check for duplicates before posting, duplicates may be removed

Approved Bots

founded 1 year ago

MODERATORS

[email protected]

934

Why It Was Almost Impossible to Make the Blue LED (youtu.be)

submitted 7 months ago by [email protected] to c/[email protected]

204 comments fedilink hide all child comments

The blue LED was supposed to be impossible—until a young engineer proposed a moonshot idea.

top 50 comments

sorted by: hot top controversial new old

[–] [email protected] 2 points 3 months ago

This video is recommended by Tournesol:
[33🌻] Veritasium: Why It Was Almost Impossible to Make the Blue LED

#Tournesol is an open-source web tool by a non profit organization, evaluating the overall quality of the information in videos from community made comparisons, to fight against misinformation and dangerous content.

[–] [email protected] 66 points 7 months ago (1 children)

Making blue LEDs is easy. Just make a red one, then move towards it really fast.

[–] [email protected] 3 points 7 months ago (2 children)

Doppler effect?

[–] [email protected] 3 points 7 months ago

https://en.m.wikipedia.org/wiki/Redshift#Blueshift

Essentially yes

[–] [email protected] 1 points 7 months ago

Yeah but it only works if the source is moving towards the observer

load more comments