hydrogen line

Questions

What does hydrogen line mean?

a spectral line of atomic hydrogen having a wavelength of about 21cm; used extensively in radio astronomy

How to pronounce hydrogen line

1. Open the pronunciation page — Open the Speakur entry for “hydrogen line”.
2. Read the phonetic spelling — Read the IPA spelling () so you know which sounds to aim for.
3. Play the audio — Click Play to hear reference audio for “hydrogen line”.
4. Repeat and practice — Say “hydrogen line” aloud, matching stress and vowels until it feels natural.