Year: 2022

A MATTER OF QUANTITY. “All substances are poisons; there is none which is not a poison. Solely the dose determines that a thing is not a poison,.” (Paracelsus, 1493–1541) https://lnkd.in/d8cAT8Cf View in LinkedIn

“Tensegrity is a design principle that applies when a discontinuous set of compression elements is opposed and balanced by a continuous tensile force, thereby creating an internal prestress that stabilizes the entire structure.” https://lnkd.in/dnijBjC5 View in LinkedIn

TEXTBOOK INTERPRETATION. “Sakurai prefers to regard Feynman's graphical method as a convenient pictorial device, rather than accept the motion of antiparticles backward in time as a suitable foundation for quantum electrodynamics.” https://lnkd.in/gDaxUYAS View in LinkedIn

BASIS OF VIEWPOINT. “Interestingly, Sakurai bases his view not on the experimental unreality of motion backward in time, but on avoiding its "logical disadvantages".” https://lnkd.in/gDaxUYAS View in LinkedIn

HAVING THE CAKE. “For similar philosophical reasons, physicists regard Feynman's version as "unphysical", preferring particles of opposite charge, for example, proceeding as usual in time, yet they also want time to be symmetrical.” https://lnkd.in/gDaxUYAS View in LinkedIn

MIRROR OPAQUE. “Throughout Feynman's career he insisted that no experiment could detect a difference between his version of antimatter and the conventional one.” https://lnkd.in/gDaxUYAS View in LinkedIn

FEYNMAN. “As late as 1985, three years before his death, in his book "QED" he stated that "every particle in Nature has an amplitude to move backwards in time, and therefore has an antiparticle".” https://lnkd.in/gDaxUYAS View in LinkedIn

BACKWARDS IN TIME. “On the same page, in a footnote he says that antiparticles can be easily made and kept for weeks, so he had no problem with antiparticles moving backwards in time indefinitely. It is hard to find another example of a physicist of such legendary status being in a minority of one on his fundamental insight which had never been disproved.” (Feynman). https://lnkd.in/gDaxUYAS View in LinkedIn

DERIVATION OF TIME BACKWARDS. “Feynman's view derived from Einstein's version of Lorentz invariant symmetry, together with Feynman's contention that the final probability of some quantum event was the square of the sum of the amplitudes of all possible paths to the result.” https://lnkd.in/gDaxUYAS View in LinkedIn

DERIVATION CONSEQUENCES. “Such paths included backward in time and faster than light paths.” https://lnkd.in/gDaxUYAS View in LinkedIn