RSS BotMB to Hacker NewsEnglish · 10 days ago

Why 21 cm is our Universe's "magic length"

0

3

Why 21 cm is our Universe's "magic length"

RSS BotMB to Hacker NewsEnglish · 10 days ago

0

Photons come in every wavelength you can imagine. But one particular quantum transition makes light at precisely 21 cm, and it's magical.

You must log in or register to comment.

Chat

Hacker News

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: !hackernews@lemmy.bestiver.se

Community locked: only moderators can create posts. You can still comment on posts.

Posts from the RSS Feed of HackerNews.

The feed sometimes contains ads and posts that have been removed by the mod team at HN.

Visibility: Public

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

255 users / day
1.55K users / week
3.76K users / month
8.46K users / 6 months
2 local subscribers
1.29K subscribers
20.2K Posts
6.98K Comments
Modlog