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A comment on One quantum transition makes light at 21 cm. Parent comment

Re:One quantum transition makes light at 21 cm by hnthrowaway0315 on Thursday April 24, 2025 @01:42PM (#43785415)
Damn that's 42 / 2!
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Re:One quantum transition makes light at 21 cm by zhengyi13 on Thursday April 24, 2025 @01:53PM (#43785527)
... so the question is "What is twice the magic quantum light length?"

Doesn't seem all that great, but I'm probably missing something.

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