When matter falls into a black hole, it increases the overall mass of the black hole.
Large black holes have more mass, more gravity, and therefore more effect on their surroundings. When scientists talk about large or small black holes, they are actually talking about the mass of the black hole. The overall mass of a black hole is what determines the strength of its gravity. We could just as easily ask, "what is the difference between a black hole made of hydrogen and a black hole made of helium?" The answer is that there is no difference (as long as the total mass, charge, and angular-momentum are the same).Īccording to the No-Hair Theorem, a black hole has the interesting property that all information and structure that falls into a black hole becomes trapped from the rest of the universe, and perhaps even destroyed, except for its effect on the total mass, charge, and angular momentum of the black hole. Therefore, adding the concept of antimatter to the discussion does not really lead to anything new or exotic. An antimatter cookie would look just like a regular-matter cookie. Antimatter is exotic in the sense of being very rare in our universe, but it is not exotic in how it obeys the laws of physics. Antimatter has positive mass just like regular matter and experiences gravity the same way. In fact, there is no difference between an antimatter black hole and a regular-matter black hole if they have the same mass, charge, and angular-momentum.įirst of all, antimatter is just like regular matter except that its charge and some other properties are flipped.
BairdĪccording to our current understanding, there is no way to distinguish an antimatter black hole from a regular-matter black hole. Public Domain Image, source: Christopher S.
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