- #1
- 1,200
- 702
Last edited by a moderator:
Click For Summary
The discussion focuses on the fine structure complex of singly ionized helium at 4686 Angstroms, detailing the identification of spectral lines and their significance. It includes calculations of wavelengths and explores the historical context of Paschen's measurements related to these lines. The conversation emphasizes the importance of understanding these spectral lines for advancements in quantum mechanics and astrophysics. Participants analyze the implications of Bohr's model in explaining the observed phenomena. Overall, the thread provides a comprehensive overview of the complexities surrounding helium's spectral lines and their relevance in scientific research.
I am observing an irregular, aperiodic noise pattern in the reflection signal of a high-finesse optical cavity (finesse ≈ 20,000). The cavity is normally operated using a standard Pound–Drever–Hall (PDH) locking configuration, where an EOM provides phase modulation.
The signals shown in the attached figures were recorded with the modulation turned off. Under these conditions, when scanning the laser frequency across a cavity resonance, I expected to observe a simple reflection dip. Instead...
Similar threads
- · Replies 2 ·
- · Replies 4 ·
- · Replies 0 ·
Insights
A Possible AI Modern Video Codec
- · Replies 1 ·
High School
Is there a Relativistic Quantum Chemistry Table?
- · Replies 1 ·
Insights
The Lambert W Function in Finance
- · Replies 0 ·
- · Replies 2 ·