Faster Than Light Tachyons, Causality and Tacos
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- Опубліковано 16 чер 2024
- This has poor audio. Please see the remastered version linked below.
What happens when you go faster than light? Can you go faster than light? (well, no, but let's chat anyway). And how do we know that we can't go faster than light? Why does going faster than light mean traveling into the past?
0:00 Introduction
0:25 Faster than Lightspeed Travel
1:12 Too Bad....
2:30 The Two Principles of Special Relativity
6:21 The Principle of Causality
11:09 Galilean Relativity in Sketch Form
16:30 Galilean Relativity: Speeds Add Together
18:02 Galilean Relativity: Do Speeds Add Together?
19:42 No Longer Galilean Relativity
25:10 The Invariability of the Spacetime Interval
29:40 A Bouncy Light Clock
38:55 Consequences of Special Relativity
39:53 What about Tachyons?
42:14 Tachyonic Anti-Telephone
49:17 Special Relativity Demands Causality
49:55 Time Dilation: Moving Clocks Run Slower - Наука та технологія
Please see the most recent version of this video: ua-cam.com/play/PLyu4Fovbph6ezYDf2FI2b8a3KMCqEr3oL.html
Just found your channel. And things are explained in a clear and "straigt to the point" way, without distracting attempts of being a stand up comedian. Easy to understand even for someone not having english as a native language.
Thanks!
So many sci-fi stories get around the "speed limit" with wormholes, and movies depict endless explanation scenes of poking a hole through a sheet of paper, creating a shortcut between two points that were far apart on the paper. But they gloss over the small detail of having to fold the *galaxy* in half through that higher dimension to bring those points closer together! I'm not sure how to calculate it, but I better that would require quite a long time and rather a lot of energy. And if your wormhole network has several openings around the galaxy, the whole thing has to be pulled together through that higher dimension.
Easy. Build really long arms and fingers, grab the galaxy, and then boom fold. Sheesh. Child's play I say. Child's play!
@@bobojr456 I feel so foolish now.
theres always gravitational waves. for all we know our 3d universe is squished as flat as a sheet of paper.
our views are always relative. no matter what your experiment. im with Buddha✊
@@luminousfractal420 Black hole mergers cause gravitational waves that, if I remember correctly, have a wavelength of smaller than an atom. I am not sure it would be possible for anything to create gravitational waves large enough to somehow 'ride the wave' to another point in the galaxy.
My fren always says "That we know of" and YEA I GUESS but there comes a time when we're right about something.
Man. I wish i would have had one of those tachyon phones in the 80s. Lmao
@30:17 Hi, thanks for the great videos, but I have question regarding the measurement of light at this point in the video: Since the measurement is being taken over a two way journey, does this mean we only measure the average speed of light, could the outbound or inbound journey potentially be a different speed to the other?
37:00 i'm at rest in my reference frame - that has got to be on a t-shirt somewhere
Why now make one?
Perfect explanation the impossibility to fly faster than S_o_L! And that explains a Fermi's Paradox, as well. We don't see in the cosmos any alien activity, because nobody could colonize even the neighboring stars, moving a fraction of the S_o_L. Tell us about that, Dr. Kendall?
True story about tachyons. When I was in university, I had a professor named Dr. Torsten Alvager who had set up an experiment in his lab to detect tachyons. 😂 Fine. The problem was that Dr. Leon Lederman (of top quark fame) had come to visit. So we were alll sworn to secrecy about the tachyon thing because I guess Alvager obviously didn't want Lederman to think he was nuts?? I wish this story had like a punchline or a funny ending but alas... Someone please find tachyons so I can send a message to myself in the past and give it one.
Anyone else have a tachyon story? No? Just me then.
What gets me is how slow light actually is. From the surface of the sun, it takes 8-1/2 minutes to get to Earth. Fourty-three minutes to get to Jupiter. Nearly four years to get to the nearest star.
And the center of our own galaxy (if there wasn't so much dust in the way)? 25,000 years! What kind of deal is this?
It's not so much about how slow light is, rather how space is incomprehensibly big.
@@victorl3969 Absolutely
Hilarious! So enLIGHTening and a Musing! for reasons unknow, as for now, but may be clarified futurely, with feather research.
Damn right its called Zed.
Also , not a bathroom unless there is a bath in there, or a sink and a ladder if you are a shortarse
Good exposition of WYSIWYG Physics.
Thanks!
It hurts my brain. Light experiences no time but it stretches over distance in time because of the expansion of space yet a photon born at the big bang could travel the 13 billion lightyear to reach us but from the photons frame it poped in and out instantly.
Physics is a bitch. - William Bell (Leonard Nimoy)
It does tend to put the kabosh, perhaps a mighty one, in the wild fantasies of the populace.
People assume that time is a strict progression of cause to effect, but actually from a non-linear, non-subjective viewpoint, it's more like a big ball of wibbly-wobbly, timey-wimey stuff.
Rewatching the shows....
protip: if you're writing a science fiction setting, use wormholes/portals (they're impossible without magic exotic matter but hey it's scifi) rather than magic FTL warp drives
Sorry, I don't have faith in formula's that return infinity, neither do most physicist. However, when it comes to FTL speed, all of a sudden, formula's that return infinity are ok. I can increase my speed forever and never reach the speed of light? Once your within the Planck length of going the speed of light, you've made it.
Within a planck length of the speed of light? Did you just prove with quantum field theory that with enough energy bradyons can become luxons? Where is link to the mathematical or theoretical support?
Never doubt what no one is sure about
Seems like that is the very definition of doubt.
ha ha haaaa
Nije te ubedio? Ni mene. Mada možda smo mi samo neizlečivi sanjari... :)
It is not possible to travel faster than light, but only if ya'll don't pick up and move the bathtub faster than light. Taint no law on how fast a bathtub moves, just light in the vacuum of space.