There must be a causal chain to make any measurement. Some causal chains interact with the subject prior to your participation (sunlight falling on an observable projectile), but some interaction must have occurred for you to measure that light. In this case you are using the light bouncing...
No need to apologize and you are not being ignorant.
I think you are right. Measurement IS interaction, and interaction and causation, that kind of thing is science!
Trying to play philosophical games about reality rewriting itself once you "consciously" are aware of it.. that is...
There is currently no evidence to suggest that consciousness in the human brain, versus an animal's brain, versus a computer, or a sensor, or any other sufficiently "measurmenty" natural system has any fundamentally different causative effect on the outcome of a complex quantum system or...
Correlation between polarization measurements of entangled photons at angles less than 45 are greater than classically statistically possible. No set of hidden variables can be preordained to explain the 75% correlation of photon measurements at 30 degrees and complete anticorrelation of...
Given the arbitrariness of time ordering of space-like separated events, how does one interpret "correlated" microcausality (as a principle)? I'm not proposing "nonlocal" is any better than "correlated" (all things considered), but does thinking "locally" have its own problems?
Thank you this was very informative. Inspired me to look through my old textbooks.
Turns out they have more info in them than I remembered...
Thank you to everyone who took the time to reply.
So I am a little confused.
I understand that contributions to that gravitational wave are generated outside the horizon, we do not observe with LIGO any process occurring "inside" the event horizon of any black hole. So too, any photon observed at LIGO must have been generated outside the...
Ah.. then would it be better to say in a direction directly toward the center of the solid angle subtended by the event horizon, on the cosmic background, as it appears to someone at LIGO?
perhaps there's a better alternative?
Is it safe to say:
1. For any specific portion of infalling matter directly in line of sight between you and the cog of the bh, "after stabilization" no photons emitted directly towards you from that specific portion of the infalling matter (straight line path) can reach you (it being beyond...
So I decided to watch "Nova: Black Hole Apocalypse" on Netflix.
At 9:20, sometime after the narrator says: "Approach one, and time itself begins to change", Neil deGrasse Tyson says:
"Time will become so slow for you that you will watch the entire future of the universe unfold before your very...
Thanks to all I think I have my answer.I was trying to resolve misleading "pop science" claims that to outside observers matter falling towards a black hole never actually crosses the event horizon of a black hole. This is an overstatement. Confirmed by the comments I have received here.
In...
Ok wrong question again I am sorry I do not know all the issues.
Suppose instead the following variation.
An indestructible physicist is orbiting a small black hole at a sufficient distance such that he is subject to 1 G just like his colleagues back home on Earth. He has chosen to orbit this...
I think we are getting closer... my questions needed some honing in.
The (non-rotating) time dilation equation relates proper times between events for an observer within a gravitational field to coordinate time between those events for an observer at an arbitrarily large distance from the...
I think I get what is "seen" by an observer but perhaps I asked the wrong questions. I really wanted to ask about the relative passage of time as an object falls to just reach the event horizon of the black hole.
To identify it and distinguish it from the rest of the universe... other objects...
What do you mean by "never"? What is observed by the stationary observer?
By "as it falls in" do you mean "as it falls toward" the event horizon or "as it crosses the event horizon"?
If you detect the increase of the hole's mass "as it falls in", does this constitute an indirect observation...