Discussion Overview
The discussion revolves around the causes of the green color observed in a bolide that was photographed. Participants explore various chemical compounds and phenomena that could contribute to this coloration, considering both atmospheric and meteoric sources. The scope includes theoretical explanations and speculative reasoning related to chemistry and atmospheric physics.
Discussion Character
- Exploratory
- Technical explanation
- Debate/contested
Main Points Raised
- Some participants propose that the green color could be due to copper, nickel, or barium present in the meteor.
- Others suggest that atomic oxygen, particularly its emission line at 557.7 nm, might be responsible for the green hue.
- A participant mentions the possibility of an optical quirk affecting the perceived color.
- One contributor recalls a childhood chemistry experiment where nickel produced a bright green color in a flame, suggesting a similar effect could occur with the meteor.
- Another participant notes that while copper is unlikely to be present in significant amounts in meteorites, nickel is commonly found in several meteorite groups.
- There is a mention of magnesium (Mg) as a potential contributor to the green color, referencing a specific meteor spectrum captured in the past.
- Concerns are raised about the influence of camera settings and display conditions on the perceived color of the photograph.
Areas of Agreement / Disagreement
Participants express multiple competing views regarding the source of the green color, with no consensus reached on which explanation is correct. The discussion remains unresolved as various hypotheses are presented and debated.
Contextual Notes
Participants acknowledge the complexity of the topic, including the dependence on specific conditions such as camera settings and atmospheric effects, which may influence the observed color. There is also uncertainty regarding the presence of certain elements in meteorites.