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Possibly the easiest way to learn about the double slit experiment is to watch it. This is a crude animated version, and excuse the glib style but it is pretty accurate:
Dr Quantum - Double Slit Experiment - YouTube
I like where in minute 3:30 he says electrons go through either slit one at a time, none at, both at the same time, and all in super-position.
I can see that photons have interference, but why does the electrons show an interference? Thats odd, they are matter right?
They are, but so are photons. Photons aren't the only things that get weird in the quantum world.I like where in minute 3:30 he says electrons go through either slit one at a time, none at, both at the same time, and all in super-position.
I can see that photons have interference, but why does the electrons show an interference? Thats odd, they are matter right?
They are, but so are photons. Photons aren't the only things that get weird in the quantum world.
Welcome to quantum mechanics! Niels Bohr supposedly once said:
"Those who are not shocked when they first come across quantum theory cannot possibly have understood it".
The experiment was first done with photons, and only some years later with electrons. Same basic results. Even buckminsterfullerene molecules - sixty carbon molecules arranged in a ball like shape - exhibit wave-like properties. It's a little strange to say the least.
It's not definitively settled as to why it happens, and very hard to explain the varying viewpoints in layman terms.
thats why protons are eternal, because we don't understand it.
Photons, again, not protons.
They're not eternal. The process I told you about earlier (creation of an electron-positron pair) is a way that they can be annihilated.
Unless you mean something else by eternal?
remember gilbert lewis
Er...yes, I do. I told you about him. He was also wrong about this detail (he knew nothing of the annihilations that I described earlier, but to be fair, it's hard to see how he could have done).
information can be destroyed too, but because it's massless it exists outside of the time dimension.
Information requires mass or its equivalent, energy, in the sense that it is the arrangement of mass or energy that conveys information. So the notion that information is "massless" is somewhat meaningless in a way, perhaps like saying 'information is blue'.
information is burned on a cd, but blank cd's weigh the same amount. Information is massless. When we die we weigh the same, so our soul or information in our body is gone but doesn't change the weight.
Oh no not the PHLOGISTON "theory" again
Actually, CDs that have information in them have had microscopic grooves carved into them by lasers. So, actually, blank CDs weigh more than CDs with information in them!
Information requires mass or its equivalent, energy, in the sense that it is the arrangement of mass or energy that conveys information. So the notion that information is "massless" is somewhat meaningless in a way, perhaps like saying 'information is blue'.
actually there are several dimensions that information could coexist in, and not be meaningless (without the mass).
"the aluminum layer is coated with a special transparent dye that turns opaque when exposed to high-intensity laser light. The CD burner uses a powerful laser to turn sections of the disc opaque. "
from
How Does CD Burning Work? | eHow.com
Which ones were you thinking of?
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