Discussion Overview
The discussion revolves around the question of why the mass of electrons does not increase when they absorb photons, particularly in the context of their motion and energy absorption, as related to the photoelectric effect. The scope includes conceptual clarifications and technical explanations related to relativistic mass and invariant mass.
Discussion Character
- Conceptual clarification
- Technical explanation
- Debate/contested
Main Points Raised
- One participant questions why the mass of electrons does not increase when they absorb photons, suggesting that electrons revolve at the speed of light.
- Another participant corrects the claim that electrons revolve at the speed of light, stating they may move at near the speed of light.
- It is proposed that when objects near the speed of light absorb energy, they increase their mass, although this is contested.
- A later reply introduces the concept of invariant mass, explaining that an object's mass does not change in its own frame of reference.
- One participant presents a mathematical relationship, ##E^2 = (m_0c^2)^2 + (pc)^2##, to clarify the relationship between energy, momentum, and mass, suggesting that the idea of mass increasing with speed has limited applicability in certain contexts, such as orbiting electrons.
Areas of Agreement / Disagreement
Participants express differing views on the concept of mass increase with speed and the applicability of relativistic mass in the context of electrons absorbing energy. The discussion remains unresolved regarding the implications of these concepts.
Contextual Notes
There are limitations in the discussion regarding the assumptions about electron motion and the definitions of mass in different frames of reference. The mathematical steps and their implications are not fully resolved.
)