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pmb

Senior Members
  • Content Count

    379
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About pmb

  • Rank
    Atom
  • Birthday 10/25/1960

Profile Information

  • Location
    Haverhill, MA
  • Interests
    Physics/Relativity, watching TV/movies, hanging around Boston, Book stores and computer stores. Lived through Acute Leukemia and am proude of it. I enjoy helping people understand physics
  • College Major/Degree
    BA Physics/Math
  • Favorite Area of Science
    Relativity
  • Biography
    Raised on Boston's North Shore, stuxied math and physics as an undergrad and in grad school
  • Occupation
    Disabled Physicist
  1. You have to be cautious in forums suchs this. Different people mean different things when they use the term mass. For example, in A first course in general relativity by Bernrd F. Schutz the author writes on page 94 ..energy and 'inertial mass' are frame dependant ... and on page 104 he writes ...energy and mass are the same.... Other people refer to mass as being synonymous with proper mass. Severian is talking about proper mass (aka rest mass). I think that with this in mind you'll better understand the subject matter. The way Taylor and Wheeler describe mass then in such explosions th
  2. This thread degenerated into a stream of insults so I deleted all my posts.
  3. It's hardly silly. Many relativity textbooks us it. Percentage wise about 67% of textbooks published between 1970 and now use it. I see no valid reason to think it silly when that many physicists use it That's incorrect. I was speaking to a well-known cosmologist/particle physicist yesterday and he told me that in cosmology physicists use the term "mass" to refer to E/c2. H'e's very very well-known in his field so I trust him. Plus I have several relativity texts which prove otherwise. The list inlcludes such texts by such authors as Misner Thorne and Wheeler (page 141), Mould, Rindler,
  4. Hello Folks! I'm newly back and want to say hello and that I sure missed some of you. I miss some lively and challanging threads with some people I have a lot of respect for. Thanks for being here folks! Now that I'm back I want to fresh and not make any mistakes and get a better understanding of the rules. I seemed to have posted things that I wasn't in the wave-particle duality thread. So I want to learn what to do in certain instances. Not only from moderators but mainly from other members who've run into similar situations and was able to resolve it to their satisfaction without g
  5. I don't know what this is supposed to say. It appears to say Total Mass of Sun = Mass of Sun + Photon Mass of the Sun The mass of the sun is a complicated function of the mass-energy of the particles in the plasma that mack up all the matter of the sun, radiation included. This includes the rest mass of all the nuclei in the sun plus the kinetic energy of all those nuclei. This includes the contribution to the mass of the sun by the radiation in the sun, i.e. photons. To be precise, pressure is also a source of gravity. It has more relevance for objects such as neutron stars. The activ
  6. Comments such as this on the graduate level text I quoted you, and which you failed to shoot down, doesn't speak well for the quality of your opinion. There simply doesn't exist a text or a peer reviewed physics journal article which says the the wave-particle duality is a myth. Many of us, such as myself, know quantum mechanics very well (graduate level) and know what you've been claiming is total nonsense. Don't you understand that? My appologies. I was simply commenting on the tact that I'm taking here.
  7. I haven't insulted juan and I never said anything rude. I also haven't stated something that wasn't true, e.g. that I never said a particle is a wave. The worst thing I did was to point out that juan was using a personal attack on immortal and is inccesant false accusations claiming I said something which I'd never say to anybody. It really bothers me to see people insult/attack others. But in order to take on a new state of politeness and civilness I have deleted those remarks. What are we supposed to do when people make false accusations? You give off the impression that it I say that s
  8. You're wrong. I already told you that and you simply ignored it. That is not how a cogent argument progresses. Prove me wrong. Reference a post where I said a particle is a wave. Until then stop putting words into my mouth.
  9. I myself go by books for the basics of physics and this is a well-known fact in quantum mechanics and is quite often addressed in text books. That's why I rely on them so much. Papers don't address basic physics for the most part so its much harder to find such an article. Here is a section from Shankar's QM text (graduate level). From Principles of Quantum mechanics - 2nd Ed. by R. Shankar (graduate level quantum mechanics text), page 113 That and [math]\lambda = h/p[/math] expresses the wave-particle duality. He's very selective about what he posts. I guess that's just human beh
  10. While I don't condone that behaviour I believe that I can, to a certain extent, empathize with your feeling. It appears that way to me too. I hope you change your mind. I find this place more tolerable with you here. From our discussions in private I've gotten to know you personally and that side of you doesn't come out here. If it did then I'm sure you wouldn't run into such problems.
  11. Today I followed an ad hoc derivation of Schrodinger's equation. I confirmed what I long knew, i.e. that a wave function of the form [math]\psi(x, t) = Ae^{i(kx - \omega t)}[/math] is a solution to both Schrodinger's equation and the wave equations. Are you familiar with such a derivation?
  12. Please don't put words into my mouth. I never said any such thing. In my opinion your arguement is flawed in that nobody has suggested that a single particle is a wave, nobody whatsoever, and your arguements are based soley on that false assuption that someone said that particle is a wave. Nobody said that in this thread. Lok for yourself. If what you say is true then you'd be able to give us a post number where it occured. I myself have never said, thought, or implied any such thing. Herein lies the flaw in your argument. In fact in my very first post in this thread, i.e. post #16, I
  13. hello! Can you add me on Facebook if you have it there? you can add me here

    http://www.facebook.com/dr.undefined

  14. Nobody in this thread has suggested that a particle is a wave. That's why I quoted Feynman. He said just the opposite, i.e. from post #16 See what I mean? We know that they don't behave like waves.
  15. All that means is that the people that you're quoting don't understand the wave-particle duality. What part of [math]\lambda = \frac{h}{p}[/math] probability density = [math]|\psi(x)|^2[/math] don't you understand? Those two relations epitomizes the wave-particle duality. Which of those two expression are you claiming is wrong and why?
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