Discussion Overview
The discussion revolves around the approximate electron number density of the Earth, denoted as n_{e}. Participants explore its significance in the context of physics, particularly regarding the MSW effect on weakly-interacting particles.
Discussion Character
- Exploratory, Technical explanation, Conceptual clarification
Main Points Raised
- One participant seeks the value of the electron number density of the Earth, indicating a lack of readily available information.
- Another participant questions the relevance of knowing the total number of electrons on Earth, suggesting it may be an obscure inquiry.
- A different participant clarifies that the electron number density is important for calculations related to the MSW effect on weakly-interacting particles.
- One participant provides a calculation, stating there is about 1 mole of electrons per 2.1 grams of matter in the Earth, equating to 1 electron per proton, and notes the Earth's mass is approximately 6 x 10^24 kilograms.
Areas of Agreement / Disagreement
The discussion does not reach a consensus on the electron number density value, and multiple perspectives on its relevance and calculation are presented.
Contextual Notes
The discussion includes assumptions about the relationship between mass and electron density, but these are not fully resolved or detailed.