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  1. Alfredo Tifi

    B Is it possible that an electron can have a negative mass?

    1. How is the mass of the anti-electrons in the Dirac's ocean - vacuum, provided they have negative energy and m = E/c²? 2. Whatever the answer to question 1., what is the physical meaning of a body having a negative mass? have it a negative inertia? Acceleration opposite to force? And about...
  2. Alfredo Tifi

    A Reversibility of radioactive decay process?

    OK, and decay time is inversely proportional to the energy barrier. Sure, that helped me a lot. But, at the same time it remembered me of attempts to relate Heisenberg's uncertainty to a sort of dissipative or sthocastic process occurring at a lower level than thermal. I can't manage the...
  3. Alfredo Tifi

    I Fundamental laws time reversal

    Sorry Dale. I just mistaken a spatial mirrored motion for a time inversion (repulsion instead of attraction).
  4. Alfredo Tifi

    I Fundamental laws time reversal

    Thank you Jbriggs to help me recognizing a misconcept of mine :-)
  5. Alfredo Tifi

    I Fundamental laws time reversal

    It is often told that fundamental laws are insensitive to +t/-t change. Let's try this one: a little mass m1 object is accelerating towards a big object M2, in -x direction in space and +t in time, due to gravity or following space-time free fall line (along a geodetic). Now, revert the video...
  6. Alfredo Tifi

    A Reversibility of radioactive decay process?

    Thank you Anodyne, but I already read that. The equilibrium I was talking about, or striving to conceive, was exactly of the kind of nucleosynthesis. I'm questioning that is strange to think about a dynamic equilibrium that is an analogous of phase equilibrium in which the decay process is...
  7. Alfredo Tifi

    A Reversibility of radioactive decay process?

    I viewed the answers to the non repliable post https://www.physicsforums.com/threads/is-radioactive-decay-reversible-in-time.673735/, but I have doubts. In particular, the last claim by nugatory: "the overall decay of the sample is as irreversible as the transfer of heat from a hotter body to a...
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