Timeline for Earliest numeric value for helium D3 line
Current License: CC BY-SA 4.0
14 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| S Aug 5, 2021 at 16:02 | history | bounty ended | WhatRoughBeast | ||
| S Aug 5, 2021 at 16:02 | history | notice removed | WhatRoughBeast | ||
| Jul 31, 2021 at 15:16 | answer | added | ACR | timeline score: 2 | |
| S Jul 31, 2021 at 13:11 | history | bounty started | WhatRoughBeast | ||
| S Jul 31, 2021 at 13:11 | history | notice added | WhatRoughBeast | Authoritative reference needed | |
| Jul 29, 2021 at 12:00 | comment | added | WhatRoughBeast | @DescheleSchilder - That is essentially what I'm asking. He (or somebody) apparently did measure it. When did he (or anybody) publish the result? | |
| Jul 29, 2021 at 0:51 | comment | added | Deschele Schilder | How could Lockyer know it was the 587.59 line? Did he measure this value? | |
| Jul 29, 2021 at 0:39 | comment | added | WhatRoughBeast | @DescheleSchilder - I can't find Janssen's paper. Narratives about his discovery suggest that he did produce a numeric wavelength, but not what value he set. He seems to have realized that the line was not the right wavelength to be sodium, but I can't find out what he thought it was. Lockyer's number would be more pertinent, since was very close to the recovered helium wavelength - but I can't find that, either. I'm especially interested in the FIRST published value. | |
| Jul 29, 2021 at 0:35 | comment | added | WhatRoughBeast | @M.Farooq - Yes, the Royal Society paper. He does not mention wavelength. | |
| Jul 28, 2021 at 21:03 | comment | added | Deschele Schilder | @M.Farooq From what I understand of it, these two wavelengths were known. Im not sure to what prcesion. So you would expect the frequency of this third line was known too. | |
| Jul 28, 2021 at 19:43 | comment | added | ACR | Did they measure those wavelengths? This is perhaps what the OP needs to find from original works. | |
| Jul 28, 2021 at 19:24 | comment | added | Deschele Schilder | Janssen diiscovered the line already earlier that year. D1 and D2 were already known. Lockyer proposed it was another element than the one giving rise to D1 and D2. | |
| Jul 28, 2021 at 18:58 | comment | added | ACR | Have you consulted the original paper of Norman Lockyer? What does he say? | |
| Jul 28, 2021 at 18:33 | history | asked | WhatRoughBeast | CC BY-SA 4.0 |