Episode 1 of 3
Observation of the D3 Line
- When
- 1868
- Where
- London
Lockyer observed a prominent yellow line in the solar spectrum from London, concluding it was caused by an unknown solar element.
In 1868, a prominent yellow line was observed in a spectrum taken near the edge of the Sun. The line could not be explained as due to any material known at the time. Lockyer, after observing it from London, suggested the yellow line was caused by an unknown solar element.
Sources
- Norman Lockyer Wikipedia, revision of 2026-09-23
Machine-drafted from the cited Wikipedia passages and checked by a reviewing model, not by a human editor. Every passage cites the revision it was written from; dates and places follow those passages.