Recent content by waynet

Yes that would make sense if that clip came from a satellite. I found that clip from this page: http://www.nasa.gov/multimedia/imagegallery/image_feature_184.html

I took a look at this video of the transit: http://anon.nasa-global.speedera.net/anon.nasa-global/venus_transit/UV1600_eastlimb2.mov And something just doesn't look right. It appears that Venus changes direction once it comes into full view. I played it foward and backwards, put a...

I don't quite get that whole thing either. I posted a thread a while back with the same idea here: https://www.physicsforums.com/showthread.php?t=11886

One weird thing I experienced about 20 years ago, late one summer night right before I went to bed I saw some light coming in the window. I took a look outside and everything was lit up. It was brighter than a full moon during the winter, and I could see distant hills were lit up also. It was...

I think A & C are the same thing, but I think a little bit of the magnetic field will slip out. Now What I was wondering if you had a long permanent rod magnet, and you coated the south side and the length of it with a superconductor so that only the north pole was exposed, what would that...

Reading your post again, I think you are trying to distribute the iron rods all around evenly. In that case you create a very strong south pole in the middle of the sphere, which I believe will try to push itself out between all the north pole rods. You will probably end up with very weak...

What I believe will happen in that situation is that you will have a south pole around the equator of the sphere. At any given point on the equator the magnetic field will not be as strong as the north poles because it is spread over a larger area than the north poles are, but the overall...

I'm not familiar with that, but I think something that compresses plasma would be an electromagnet and not a fixed magnet.

I have a bunch of NdFeB sphere magnets in various sizes. All the time the poles are on the opposite ends, and they don't move. It wouldn't be permanent if they did move. It is possible to make them not be on opposite ends, but I never seen a sphere magnet like this. As for ring magnets...

I found this page that shows how you can have waves cancel each other out: http://www.colorado.edu/physics/2000/applets/fourier.html One time I've experienced this is when a friend of mine didn't wire his car stereo correctly, so that both front car door speakers were wired on the same...

Probably, but I wouldn't know where to look for it, I'm not a physicist. That is why I suggested the change. I guess it could be done several ways. So, you are going to try building such a device?

This thread kind of makes me wonder of something else that I have thought about. What about the expansion of the universe? If the stretching of space is uniform, would it have an effect on smaller scales like the solar system? Say for instance, if the universe had doubled in size the last...

Maybe he meant that all visible light ends up at detector 1. Common sense would make you think that it would only be half the intensity, but I guess sometimes stuff like this seems to defy common sense. Looking at your diagram, you may have to change that first double glassed mirror to a...

At the point the two will meet they will cancel each other out, but the waves will pop back out and continue on, so no energy is lost. My question was if they were going in the same direction and they lined up perfectly. I would imagine it would be hard to get two waves to do that, but I...

So you are saying that it is impossible to have destructive interference without constructive interference? Is there proof of this somewhere?