Can We See What's Inside A Blackhole By Doing This?

[kaththisuresh]

Theoretically,if we shine particles travelling faster than the speed of light on a black hole,can we see the singularity inside?

[ToraToraTora]

no.

[New Judge]

How do you propose accelerating the particles to a speed greater than that of light?

[Hopkirk]

To see anything inside, light has to come towards you. It can't.

[jno]

https://www.forbes.com/sites/startswithabang/2019/06/28/this-is-how-physicists-trick-particles-into-going-faster-than-light/?sh=4101c9c0462c

[Paigntonian]

no.

[jim360]

The short answer is "no", but to be honest the question deserves a bit more of a reply than that.

For example, it's worth discussing what it would mean to "see" anything, which usually means registering light or other EM radiation. In that case, it's clearly impossible, because the very nature of light prohibits it from travelling faster than itself. On the other hand, maybe you mean "seeing" by using some hypothetical new particles, which invites a discussion about tachyons.

Tachyons are hypothetical particles that travel faster than light, but what is weird about them is that they *always* travel faster than the speed of light, and the effect of this is to allow them to move, effectively, backwards in time. Maybe tachyons don't actually exist, but assuming they did it would be difficult to see how you could make use of them -- in effect, tachyons are seen before the event that causes them, which violates all sorts of current laws of physics.

The point isn't to be discouraged by these answers, though, but to see them as a jumping-off point for exploring even more interesting questions. In all likelihood we will never see the inside of a black hole, or at least not if we wanted to live and tell anybody else about it, but it's worth pondering all the same, and hopefully you can enjoy reading up about, among other things, light cones, causality, spacetime, tachyons, event horizons, the gloriously-named "Cosmic Censorship Hypothesis", and so on.

[ToraToraTora]

jim, as a thought experiment, if there was faster than light "Xlight?" then would that be emitted from the singularity and thus reduce the (X)event horizon distance from the singularity based on the original mass of the collapse (chandrasakur black hole for example) and thus escape the normal C event horizon but have its own even horizon closer to the singularity?

[Hopkirk]

Stop it, my brain hurts.

[douglas9401]

If light can't escape from the side we're viewing, nip round the back and see if the curtains have been left open.

[New Judge]

//...but have its own even horizon closer to the singularity?//

If the "X-Light" had a velocity faster than light, wouldn't the event horizon be farther from the singularity?

[ToraToraTora]

judge, If it can go faster it can get closer and still escape. I think!

[davebro]

I love our (limited) understanding of the universe. It's a shame that it will die when the earth ceases to be.

[Old_Geezer]

The universe doesn't depend on the Earth.
And the human race simply needs to survive and spread out to other solar systems.

[jim360]

Difficult for me to answer TTT's question, but I'll draw an analogy with Hawking Radiation and guess that yes, the black hole could lose some mass in that circumstance.

[ToraToraTora]

jim, it was difficult enough for me to even phrase the question!

[ToraToraTora]

TBH though would HR not work the same on the edges of the event horizon but close to the singularity. Thus evaporate quicker, yes I see!

[jim360]

Lots of caveats to an answer I gave only a few seconds of thought to, mind.

[roslyn251254]

Hello jim ... just watched you on an old 15 to 1 episode!

[jim360]

Oh god, Monty Don again :(

[Rev. Green]

Feynman's explanation of the double-slit experiment is that photons travel on every imaginable path, including to the far side of the universe and back, and it is the interference sum of all these paths that produces the effect that we see of a photon moving in a straight line at the speed of light. So perhaps each photon has already probed the centre of all black holes. Remember that Einstein did NOT say that nothing could travel faster than the speed of light in a vacuum: information is limited to this speed.