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How do black holes increase in mass?

We know that the event horizon of a black hole distorts space time so much that time basically doesnt exist on its surface. For an outsider observer, an object falling into a black hole would appear to fall forever. And indeed its forever falling, never quite touching the event horizon. As its almost touching the event horizon, 1 second for that object may mean the entire age of the universe around.

Therefore, if objects NEVER cross the event horizon due to time distortion, how is it possible that black holes increase in mass due to accretion??

Even if they swallow a hole star, that star will never cross the event horizon and add its mass to the singularity!

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  • 10 years ago
    Favourite answer

    Uniontera number 10, hope it helps.

    Existence is the time expressed by light itself. http://www.youtube.com/watch?v=AN1jTwHUC7E

    1. Arrow A is the laser work. (Same time work)

    2. Arrow B is the reason of gravity. (also, Higgs boson individually / Different time work)

    3. The rose line is the beginning light. (result from Bible)

    4. The existence of different time. (result from relativity of light)

    5. 2 dimension is not a space. (result from 2-axis, math)

    6. Universe came from nothing. (result from No.5 / cf. Playing with bubbles)

    6-1. A barrier[posititon] exist between the inner and outer bubbles. But universe do not have that barrier. (Cause of Inertia / Reason of Sun / Position of Antimatter)

    6-2. Nothing is not a no existence. No existence is a zero dimension. There is two zero dimension. One has a position. The other doesn't have a position. These different positions were connected by something. That "something" is not a what but a way. (Cause of Light)

    7. Progress / Event / Probability is a time. (This is my trinity.)

    8. Wave-particle duality of light, creation & evolution, uncertainty principle, etc. (result from No.7)

    9. Coalescing of different time. (Cause of Rotation & Spin / Equator has plenty of time.)

    10. Your so-called black hole is a wholly condensed time. (cf. Kerr spacetime)

    11. The reason of "your so-called magnetic field". (result from step3 and 4)

    12. The reason of "your so-called electric field". (result from the crack of time / Same time's crack is a different time's coalescing. / Cause of Static electricity)

    13. Your so-called "space" is a crack of time. (result from No.12 / Cause of Lightning)

    14. Boundary is a crack of space. (result from No.13 / Same space's crack is a different time's contact. / Cause of Superfluid, cf. Fractal)

    15. Boundary is nothing. Your so-called hole is a boundary itself. Also, nothing is K=0 temperature. (result from No.14 / cf. Calabi-Yau, Hilbert space)

    16. This is a wall of your so-called fire. (result from No.15) - copyright ⓒ uniontera

    Our nonsense has come from one time. Uniontera is a key.

    English is not my first language, sorry!

    If it is difficult to understand, just remember & enjoy "Hand touching everything is a time". This is the only one result of uniontera.

    Source(s): uniontera poem _ type A
  • ?
    Lv 4
    4 years ago

    you're staggering that as an merchandise advantageous properties velocity its mass will develop. this is a effect of Einsteins equation E = mc^2. As an merchandise advantageous properties velocity it advantageous properties power it is stored in its kinetic power. So this power would be equated to mass. for this reason a relentless stress does not produce a relentless acceleration. so as an merchandise will develop its kinetic power it demands greater stress to strengthen up it. So if an merchandise with any relax mass have been to realize the cost of sunshine this is going to require an limitless volume of stress to strengthen up it to this velocity. for the reason that stress and power are correct it would additionally require an limitless volume of power. for the reason that this power would be conserved as kinetic power this would infinitely develop the mass of the item. through fact the stress of gravity is ruled by using the mass of an merchandise and the area removed from it this suggests that the gravity felt by using an merchandise shifting on the cost of sunshine would develop. i don't understand if it would grow to be a black hollow nevertheless. As an merchandise gets nearer to the cost of sunshine there's a phenomenon noted as length contraction. This motives the item to, curiously, get smaller interior the direction of its return and forth. If the item have been vacationing on the cost of sunshine the Lorentz component would be undefined and so i don't understand the way it would look. A black hollow has a singularity at its heart, this merchandise does not have a singularity. i'd have a top yet an undefined width, and so would desire to no longer be a factor. through this the size of an merchandise does not truly count huge kind, it is quite often the mass it is of effect. this is going to likely be reported that each and all and sundry of those outcomes would purely be seen from an exterior reference physique. in case you have been in a deliver shifting on the cost of sunshine you does not word something changing. a minimum of so a techniques as i understand.

  • Anonymous
    10 years ago

    the main thing is that the black hole attract all the matter of the star towards itself due to gravity. so be it in its event horizon but it add to the mass of that black hole

  • 10 years ago

    The mass is from that which falls into the black hole and the force of gravity falling into the black hole. Black holes themselves do not contain mass.

  • Anonymous
    10 years ago

    I like turtles

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