Discussion Overview
The discussion revolves around the identification of strange absorption peaks observed in a solar spectrum taken during a Physics lab. Participants explore potential explanations for these features, considering both atmospheric effects and the calibration of the spectrometer used for the measurements.
Discussion Character
- Exploratory
- Technical explanation
- Debate/contested
Main Points Raised
- One participant initially speculates that the absorption peaks might indicate a solar prominence but later doubts this due to potential issues with the spectrometer.
- Another participant questions the specifics of the observed peaks, asking for clarification on their position relative to the sun.
- A later post suggests that the absorption features at ~690, 720, and 760 nm are likely due to telluric absorption by molecules in the Earth's atmosphere, specifically water.
- Some participants discuss the accuracy of the wavelength calibration, with one suggesting that if the data is not properly normalized, the observed features could be misidentified as O2 lines instead of H2O.
- There is a mention of using Wien's displacement law to calculate the peak energy output from the sun, raising questions about the accuracy of the observed wavelengths.
- One participant expresses uncertainty about the presence of H2O in the sun's atmosphere, suggesting it is unlikely.
- Another participant reflects on their previous observations, noting that they misremembered the relative strengths of O2 and H2O lines in different spectra.
Areas of Agreement / Disagreement
Participants do not reach a consensus on the nature of the absorption peaks. There are competing views regarding the calibration of the spectrometer and the identification of the absorption features, with some attributing them to atmospheric effects while others question the accuracy of the measurements.
Contextual Notes
Participants express uncertainty regarding the calibration of the spectrometer and the accuracy of the observed wavelengths. There are also unresolved questions about the presence of specific molecules in the solar spectrum and their implications.
