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Re: BlackHoles

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Posted by Yelmalio/">Yelmalio on January 8, 2000 22:43:40 UTC

We think black holes are huge dead stars which 's mass is so high that can emit photons but,is light really made of photons if they are how does the colours form. for different colours i think there must be different wave lenghts maybe photons and wave lenght forms together light this theory seems ok but if light is only a wave length then the black hole wouldnt emit the light, can it?

A Black Hole does not emit light. At all. That's why it's black and a hole. They're also not huge, massive, but not huge. A Black Hole may have a diameter of about the Earths but a mass of 2+ solar masses.

As for light, it is both a photon and wave. This is the hardest thing to appreciate. Whether light behaves as a wave or particle depends on circumstance. We see colour as the wavelength of light but Electromagnetic forces (e.g. light) are transmitted as photons. Wierd, hey.

So do we prove that light is made of photons ?

Been there, done that. Take an gold leaf electroscope, charge it and fire UV light at it. The charge is lost. Hence light (photons) is responsible for loosing the charge (knocking particles, electrons, off the gold leaf).

do black holes keep stars in the galaxy ,in every galaaxy is there a black hole in the middle?

There is thought to be a massive Black Hole in the center of every galaxy, not known though.

Do they keep stars together, no way. A massive Black Hole will probably have millions of solar masses (mass of around millions Suns ). A galaxy will have a mass of billions of solar masses. The Black Hole in the middle will be a million times less msssive than the galaxy. Gravity falls off as one over distance squared. The gravity of the galaxy exceeds that of the central Black Hole, if it exists.

So the worst quetion here:If black holes have so high mass even to emit light how can it throw out matter?What happens when the mass of the black hole becomes so much?Can there be explosions throwing matter out by the high preasure?

Black Holes do not emit light, they do not emit matter. Except for hawking radiation, accretion disks and jets, but not the Black Hole.

Explosions from a Black Hole due to presure throwing out matter: haven't got a clue what you are thinking about.

Yelmalio - I appreciate English is not your first language. Please elucidate.

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