Recent content by Jeff Root

I doubt it will answer my questions, but I'll definitely try to find some polarized filters and do this. I can imagine what I will (and won't) see. Thank you, too. -- Jeff, in Minneapolis

Oh! I don't recall ever seeing lamba represent parity. I presume that is somebody's standard. I'll have to reconsider everything. Thank you. -- Jeff, in Minneapolis

Thank you. You kept it pretty brief and simple, but there is a great deal about it that I don't understand. Let me start with the very end, which seems like it might be easiest to explain. What do you mean by "mapped to"? Something more than what it means for one thing to be the mirror...

Are photons left- and right-handed? If so, does the handedness change when a photon is reflected? Is there any other way the handedness can change? -- Jeff, in Minneapolis

OK, if PF isn't using IPv6, then my question is irrelevant. Thank you! -- Jeff, in Minneapolis

Does Physics Forums connect to the Internet via IPv6? It is difficult for a user to connect with IPv4, and I thought that might be the cause. -- Jeff, in Minneapolis

I don't see it. The net gravitational force is toward the opposite hemisphere. That is the opposite of what you are claiming. The diagram shows a cross-section through the Earth with the axis of rotation vertical and the equator horizontal. The blue arrows are vectors of gravitational...

That's what I asked you to explain. What is this mysterious component of Newtonian gravity that is "parallel to the local surface"? Where does it come from? -- Jeff, in Minneapolis

Can you explain why the path of the mass curves around the pole instead of continuing in the same direction? -- Jeff, in Minneapolis

I agree that the effect on gravitation of the equatorial bulge is nearly negligible. As I said, it is not part of my argument, just a minor adjustment. However, it is opposite the direction of the gravitational force needed to make the path of the mass curve away from a great circle into a...

Yes, that is why I asked you where this mysterious gravity force comes from. It seems to be something that you made up. I've never seen any reference to anything like it before you brought it up here. Nobody else posting in this thread suggested such an idea. On the surface of the geoid...

I take it that what you disagree with is my assertion that the mass moves, not my description of the shape of the Earth or my description of the imaginary path as a great ellipse, correct? Your argument seems to be that there is a net gravitational force on the mass toward a point on Earth's...

Dave, Yes. Both questions were raised by Nugatory in post #24, where he said: > At lower frequencies, we can observe the waveforms with an oscilloscope > and see the sine wave directly on the screen. This was surprising to me, so I thought I may have misunderstood what he meant. He may...

Yes. As FactChecker said, that is what I meant, and as you replied, I should have noticed and kept them separate. I just didn't think of doing that. I was trying to avoid discussing forces in different reference frames. My argument is that an object on Earth's surface, moving with Earth's...

davenn, When I say that radio waves can only be detected in very large numbers, I mean that unlike visible light, it is not possible to detect a single quantum of radio energy-- a single photon, or "a single wave". It requires the energy of a large number of radio-wavelength photons working...