Whirling_Cloudburst@lemmy.world to

Technology@lemmy.worldEnglish · 9 months ago

Why It Was Almost Impossible to Make the Blue LED

935

Why It Was Almost Impossible to Make the Blue LED

Whirling_Cloudburst@lemmy.world to

Technology@lemmy.worldEnglish · 9 months ago

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

Chat

heckypecky@lemmy.dbzer0.com
link
fedilink
English
arrow-up
9·
9 months ago
Handheld battery powered X-ray devices exist and are widely available. I used to work with those. In Germany you need a permit to operate them. https://www.thermofisher.com/order/catalog/product/de/en/XL2

Technology@lemmy.world

technology@lemmy.world

You are not logged in. However you can subscribe from another Fediverse account, for example Lemmy or Mastodon. To do this, paste the following into the search field of your instance: !technology@lemmy.world

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

Visibility: Public

This community can be federated to other instances and be posted/commented in by their users.

3.6K users / day
10.3K users / week
17.6K users / month
34.9K users / 6 months
1 local subscriber
59.4K subscribers
12.1K Posts
551K Comments
Modlog