Black Hole size comparison ! From 1 to Holy shit factor 100

[Bilal.]

I can't get your point of contention ! Could you clearly state them again !

What I am saying is: from the outside observer's (like the scientists observing the effects of a blackhole and measuring it's size) an object falling into a blackhole will take infinite amount of time to actually fall into it.

Since the mass of a blackhole is a function of mass of stuff that has fallen into it ( including at the time of it's birth), how since the instance of it's birth till now (from outside observer point of view) in a few billion years it grew to this size when from from an outside observer point of view the stuff never actually fell into the event horizon and thus the singularity.

And yet observationally, it is there, and have grown within a finite amount of (outside obversers) time where as it should not have been.


Did I make any sense :/

 

[AZADPAKISTAN2009]

The equations were wrong

 

[Providence]

What I am saying is: from the outside observer's (like the scientists observing the effects of a blackhole and measuring it's size) an object falling into a blackhole will take infinite amount of time to actually fall into it.

Since the mass of a blackhole is a function of mass of stuff that has fallen into it ( including at the time of it's birth), how since the instance of it's birth till now (from outside observer point of view) in a few billion years it grew to this size when from from an outside observer point of view the stuff never actually fell into the event horizon and thus the singularity.

And yet observationally, it is there, and have grown within a finite amount of (outside obversers) time where as it should not have been.


Did I make any sense :/

Point is you are taking two events which are on different side of the event horizon. That's why the confusion.

When the falling object is on your side of the event horizon, you see it slowing down to a standstill as it reaches the horizon and then the image (which you would see) will red shift away into oblivion (which takes eternity as you correctly mentioned). However, this image is the one which is just before the object crosses the horizon.

When the object crosses the horizon, you will have no idea what happens to it and the events which happen in the object's lifetime (like getting assimilated into the singularity) after it crosses the horizon CANNOT be placed in your time line EVER. So you will never be able to say conclusively what happens to it.

The object however will not feel any difference as it makes the transition from your side to the other side of the horizon !