Recent content by Dense
-
D
Graduate Understanding Single Particle Interference in Quantum Physics
Wow! Do you know where I might find the text of that seminar?- Dense
- Post #62
- Forum: Quantum Physics
-
D
Graduate Understanding Single Particle Interference in Quantum Physics
Sorta-kinda. Similar to Bohm's "pilot wave," with all possible "pilot waves" in the photon's phase space going out, outside of time, and interfering with each other. The analogy only needs one more dimension on top of time for it to make sense.- Dense
- Post #61
- Forum: Quantum Physics
-
D
Graduate Understanding Single Particle Interference in Quantum Physics
I find it helps to think of it this way: Imagine lightning. You know how, before the visible lighting bolt strikes, the phenomenon first finds the path of least resistance; and once that path has been carved out in the atmosphere between the two charges, the bolt slams down that path. So...- Dense
- Post #27
- Forum: Quantum Physics
-
D
News Who Poisoned Alexander Litvinenko?
Okay, so the man died from radiation poisoning that could only have happened if he had ingested, breathed or otherwise taken the stuff internally. It's from Polonium-210, which apparently is freely available in unregulated stuff one could buy online. A quantity sufficient to produce a fatal...- Dense
- Post #27
- Forum: General Discussion
-
D
Graduate Dirac's Relativistic Equation and the Mysterious Nature of Gravity
I thought this was helpful. http://72.14.209.104/search?q=cache:b2cV5aGiR_4J:hypatia.ss.uci.edu/lps/psa2k/quantize-gravity.pdf+%22Why+Quantize+Gravity+(or+Any+Other+Field+For+That+Matter)%3F%22+pdf&hl=en&gl=us&ct=clnk&cd=1- Dense
- Post #12
- Forum: Quantum Physics
-
D
Graduate Learning QM and the math required.
There aren't a whole lot of options. Most books that try to explain it without using math are not very good. The reason is because the concepts are largely mathematical, and do not translate well into plain English. So most mathless books tend to be general summaries of how the concepts have...- Dense
- Post #4
- Forum: Quantum Physics
-
D
Graduate What are Stephen Hawking's Theories?
Did you spell his name right? Info on him is pretty easy to Google. From his website ([PLAIN]www.hawking.org.uk):[/URL] Stephen Hawking has worked on the basic laws which govern the universe. With Roger Penrose he showed that Einstein's General Theory of Relativity implied space and...- Dense
- Post #5
- Forum: Quantum Physics
-
D
Graduate Uncertainty Principle and Wave Particle Duality
Ah! Yes! Thank you! A light bulb just went on in my head. Thanks. (Now if I can just get the rest of them to turn on...)- Dense
- Post #16
- Forum: Quantum Physics
-
D
Graduate Uncertainty Principle and Wave Particle Duality
Doesn't surprise me. :smile: Googling around after posting my garbled thought, I found this page http://hyperphysics.phy-astr.gsu.edu/hbase/quantum/scheq.html The second box there says sort of what I was thinking, and more clearly.- Dense
- Post #13
- Forum: Quantum Physics
-
D
Graduate Uncertainty Principle and Wave Particle Duality
Isn't it sort of a definition of the Hamiltonian operator that it’s what you’d use to determine what happens to a waveform anyway? I'm new to all this, though, so I might not be following. A free particle with a definite state of energy, which is moving through time and space, is going to...- Dense
- Post #11
- Forum: Quantum Physics
-
D
Graduate Can positrons create a time-traveling chain reaction in vacuum?
I certainly like Wheeler's idea of a single electron zinging back and forth through time so many times that it makes up all the electrons in the universe. But how does that mesh with the experimental evidence that electrons can be created? They didn't pre-exist, so they have a terminus...- Dense
- Post #3
- Forum: Quantum Physics
-
D
Graduate Why don't the Slits collapse the wave function?
The difference is that the slits merely limit the potential paths of the photon, while an observation captures the path actually taken. Think of it this way. A photon is created. It is going to travel at velocity c. It could go in a bunch of different directions. Imagine that -- before...- Dense
- Post #79
- Forum: Quantum Physics
-
D
Graduate Quantum Entanglement: Effects on Particle 'b
This is pretty neat:- Dense
- Post #14
- Forum: Quantum Physics
-
D
Undergrad Calculating air drag for a massive rocket
When one of your variables changes (like air density at various altitudes), and you have a formula for how it changes (like air density at various altitudes), there's this marvelous mathematical tool that let's you do calculations. It's called "calculus." Get an adult to help. :-p