Discussion Overview
The discussion revolves around the concept of the size of photons in comparison to electrons, exploring whether photons can be considered to have a size similar to that of electrons. Participants engage in theoretical reasoning, questioning definitions and implications of size in quantum mechanics, and referencing experimental results related to particle behavior.
Discussion Character
- Exploratory
- Debate/contested
- Conceptual clarification
- Mathematical reasoning
Main Points Raised
- Some participants propose that all photons may have the same size and spatial distribution of mass-energy as electrons, citing the lack of experimental evidence to contradict this hypothesis.
- Others argue that the concept of size for photons is meaningless, as they are point particles and do not have volume, questioning the validity of discussing photon size.
- There is a contention regarding the interpretation of the de Broglie wavelength, with some asserting it does not define size and others suggesting it could relate to the size of an electron depending on its velocity.
- Participants mention high-energy scattering experiments that suggest the electron has no finite size, with an upper limit proposed for its radius.
- Some contributions highlight that while photons do not create tracks in bubble chambers directly, they can lead to observable effects through pair production.
- There is a discussion about the implications of measuring size based on quantum mechanical principles, with some expressing skepticism about the validity of such measurements.
Areas of Agreement / Disagreement
Participants express multiple competing views on the size of photons and electrons, with no consensus reached regarding the definitions and implications of size in the context of quantum mechanics.
Contextual Notes
Participants note limitations in defining size in quantum mechanics, particularly regarding the de Broglie wavelength and its relation to particle behavior. The discussion also highlights the complexity of interpreting experimental results in the context of particle size.
