Indeed, and we know the universe is a very smart place, or at least weird.
where does light from a torch go?
- Thread starter emanresU
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Indeed, and we know the universe is a very smart place, or at least weird.
OMG WE HAVE AN ENERGY LEAK.
Now everybody gets to guess what happens at inifinity.
Now everybody gets to guess what happens at inifinity.
Interesting. I can't think of how it could do that without using photons.
Me neither. Perhaps it is already connected in some way prior to releasing energy. Could that be possible? Spooky action at a distance and all that.
exchemist
Valued Senior Member
But this is as pointless an argument as that of Bishop Berkeley. If the photon behaves as if it exists whenever it is measured, then to speculate as to whether it may cease to do so in between is utterly moot.
To put it another way, if, to borrow a legal phrase, it exists at all material times, then that's what we mean when say it exists.
This can be seen as the Occam's Razor principle, yet again. Since all observations can be explained by postulating continuity of its existence, addition of a further postulate, that perhaps it ceases to exist when not observed, adds nothing. It is against science to add unnecessary postulates.
That takes spooky to the level of superstition.
Sonar. I think both technologies exist...Interesting. I can't think of how it could do that without using photons.
The black hole absorbs it. That's what they do!
But it's at the edge facing outwards, perpendicular.
exchemist
Valued Senior Member
The universe is not trying to argue anything, so it doesn't need to have a "point".
exchemist
Valued Senior Member
So?
The whole point about a black hole is that light can't get out, even if it is pointing directly outwards.
But I want to know where the light goes to. Where does it get absorbed once it's left the flashlight in order to satisfy conservation? It can't escape the black hole and it doesn't get bent along a parabolic path or anything like that because it is perpendicular to the centre. So if the battery depletes, where does the light energy end up?
It starts out pointed away from the center, but the extreme gravity warps the geodesic the light follows, and it just goes round and round.
It doesn't have to get absorbed by anything to conserve energy, it just keeps traveling round and round.
Kind of like this thread.
And all the while the local path is a straight line. There have been sci fi dramatizations of this in which a person exits Door #2 of a room to find he just entered Door #1 of the same room.
And all the while the local path is a straight line. There have been sci fi dramatizations of this in which a person exits Door #2 of a room to find he just entered Door #1 of the same room.
It curves around and goes back toward the center.
What does a parabola with zero width look like?