Recent content by Usaf Moji

Among those who believe in gravitons, is it believed that gravitons cause inertia? This would seem logical to me since gravitational mass is, as far as we can tell, the same as inertial mass.

Hi seekingAdvice. I think I may have accidently misled you with my post. It's a good idea to take the patent agent exam. What I meant to say was that it's better to be a patent agent trainee than a patent examiner working at the USPTO. Of course, it's better to be a full-fledged patent agent...

Sorry, I meant to say "rather than being a patent EXAMINER", not "patent AGENT". Of course, the goal of a patent agent trainee is to ulitmately become a patent agent. Sorry if I confused anyone.

Let's say you graph some function. Then you take a very small piece of the graph - from that small piece you have all the info you need to draw the entire graph again. Think of an EM wave as the whole graph. Now think of a photon as a very small portion of the graph.

In clasical physics, light is an electric "field" perpindicular to a magnetic "field". It isn't really known what a "field" is exactly other than something with energy that exists in spacetime that has the propensity to exert force. Light is a wave because the magnitude of the electric and...

They also have physical meaning in Cramer's Transactional Interpretation of Quantum Mechanics: http://www.npl.washington.edu/ti/

Hi, I'm not aware of any instance where effect before cause was proven. I know, however, that a physicist named John Cramer is trying to prove it. See this thread: https://www.physicsforums.com/showthread.php?t=177506

Hi Azza, you are a man of sound common sense. There are different kinds of "mass". Like everyone else said, light doesn't have rest mass. But it does have "relativistic mass" because it moves at the speed of light. This means that it has "inertial mass" and "gravitational mass" (Einstein said...

Agreed.

I'm perplexed about something that Wikipedia says about photon helicity: (see http://en.wikipedia.org/wiki/Photon) But for a photon, doesn't the spin vector always point in the same direction as the momentum vector - and therefore, shouldn't the magnitude of a photon's helicity equal it's...

Wouldn't it also be gravitational mass?

Has anyone heard of the journals published by this group, Scientific Journals International (SJI)? Their website is http://www.scientificjournals.org/ Are these journals generally respected in the scientific community?

Thanks jtbell, I should have specified that the particles are massless so that each has only two possible spin states (+ or - 1). On this basis, I would imagine that the system can only have two possible spin magnitudes, 0 or 2 (and not 1). Is this correct?

I have a noobish question on spin addition. If I have a system of two particles, each with spin 1, and the spins don't interact, what is the total spin of the system (assuming zero orbital angular momentum)? Is the total spin just 2? (I hope that my reach hasn't exceeded my grasp here.)

I'm not familiar with the particular setup described in your post, and I haven't read any of Brian Greene's books. But I know that for the original double-slit experiment, when the detectors are on, but the screen that the observer looks at is off, you get an interference pattern. If you keep...