omon

As i understend our uneverse is balansed (matter antimatter,implosion explosion)
So there is light (fotons).Is dark absance of light or something else (antifotons for example), and if light is moving at light speed should be dark be moving at its own speed?

neyzen

I think; light is moving, dark is stagnant. I mean light is active, dark is passive.

Sombra

Darkness is simply the absence of light. By the way if you would live in a galaxy made of antimatter you wouldnt notice the difference to your normal galaxy.

dalem

The balance you describe is incorrect. There is far more matter observed in the universe than antimatter, for instance. Implosion vs. explosion is not known yet because we're not sure if there really is enough matter in the universe to slow the rate of exansion down.

And dark is truly simply the absence of light/energy.

-dale

omon

is black hole an implosion?

highsea

Black holes that are remnants of stellar mass are. A star has to be a certain size (about 3X our sun) for it to happen. The star basically burns out and collapses under the force of gravity.

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omon

do you think that implosion can be duplicated on smaller scale with with medium other than remnants of stellar mass ?

highsea

To create a black hole?

omon

no. to create implosion energy

gunnut

There is no implosion.

The implosion is a total collapse of matter against its own gravity field.

A large star that's capable of become a black hole stays up from the thermal nuclear reaction within its core. The outward pressure generated by the reaction counter acts the inward pressure of gravity. Once the reaction is over, the matter collapses, like knocking out the pillars of a building.

I guess you can liken this to building demolition. A big building stays up because of all the structures hold it in place. When we want to collapse the building, we wire explosives at the load bearing columns and blow them out. The weight of all that mass is constant. The support is gone. Down goes the building (or star).

The media irritates me by calling this type of demolition an "implosion." We don't implode the building. We collapse it.

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gunnut

Back to your original question.

Light is photons. Dark is the absence of light. Light moves at the speed of light, or so we thought until very recently. There are ways of slowing down light. The exact science is way beyond my understanding.

Anti-photons do exist, but it's not darkness.

Anti-matter is just like normal matter except they carry an opposite charge. We have seen anti-protons and anti-electrons (also know as positron).

Theoretically there should be equal amount of anti-matter created at the dawn of time as matter. But we don't or can't observe that. Probably a good thing since the result of matter contacting anti-matter is annihilation, which is nearly 100% efficient at creating energy. Nuclear fusion is onlly 3% I believe.

ArmchairGeneral

Not really. Anti-protons, anti-electrons, and anti-neutrons certainly exist, but there is no such thing as an anti-photon.

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gunnut

Photon is a particle. Shouldn't there be an anti-photon? Like there's anti everything? Could it be that we haven't discovered it because we can't see it?

dalem

Photons are massless and have no charge so they are, in effect, their own antiparticle.

-dale

hello

Anti-neutron? If antimatter is just matter with opposite charges, what charge does an anti-neutron have? Neutrons have no charge, they just a clump of quarks taking up space.