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OwlFancier posted:It's more like it's constantly throwing photographs at your eyes and it takes them 16k years to get there. That's the point: the finite speed of light means that for any given perspective, distance is time. I got C's in my physics classes but my understanding is that is one of the foundational elements of relativity. Even gravity has a finite speed limit that causes intuitive understanding of physics to go haywire when scales get big. Reckoning with my eyeballs in effect achieving time travel pulls back some of the veil and, for me at least, has this vertiginous feel to it that, if I try to articulate it, results in marginally more well-read Jayden Smith tweets. Mirrors, eyes, etc.
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Jun 10, 2021 17:04
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Blue Footed Booby posted:I got C's in my physics classes but my understanding is that is one of the foundational elements of relativity. Yes it is. C2 specifically.
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Jun 10, 2021 17:45
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Thanks to this thread derail I looked up "Is the speed of light constant?" The short answer: Not really, but that's due to outside forces working on it.
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Jun 10, 2021 18:52
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In laboratory conditions, scientists have managed to slow down light to the point that it would not only get overtaken on a freeway, but also flipped off by the people held up behind it. https://abcnews.go.com/Technology/story?id=99111&page=1
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Jun 10, 2021 19:21
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The speed of light *in a vacuum* is constant. As soon as you have matter in the way you're looking at something different.
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Jun 10, 2021 19:24
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9 years ago: light at 1 trillion FPS https://www.youtube.com/watch?v=EtsXgODHMWk 2 years ago: at 10 trillion FPS https://www.youtube.com/watch?v=7Ys_yKGNFRQ
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Jun 10, 2021 19:48
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Platystemon posted:Now go look at the Andromeda Galaxy, two and a half million light-years out there. I spent the night in the Australian outback, and the sky was so breathtakingly beautiful, so MUCH of it! I'm glad I didn't know how far away Andromeda was at the time, because I'd have been very upset.
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Jun 10, 2021 20:59
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Blue Footed Booby posted:That's the point: the finite speed of light means that for any given perspective, distance is time. I got C's in my physics classes but my understanding is that is one of the foundational elements of relativity. Even gravity has a finite speed limit that causes intuitive understanding of physics to go haywire when scales get big. Reckoning with my eyeballs in effect achieving time travel pulls back some of the veil and, for me at least, has this vertiginous feel to it that, if I try to articulate it, results in marginally more well-read Jayden Smith tweets. Mirrors, eyes, etc. It's pretty much this. Time-Vertigo. Timetigo
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Jun 10, 2021 21:01
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Retrovertigo?
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Jun 10, 2021 21:11
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By popular demand posted:Retrovertigo? I have a friend who suffers from this. Any time he isn't high he gets sick.
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Jun 10, 2021 21:14
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Inceltown posted:I have a friend who suffers from this. Any time he isn't high he gets sick. weird way to find out we're friends
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Jun 10, 2021 21:55
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DandyLion posted:weird way to find out we're friends
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Jun 11, 2021 01:12
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Blowing a 5,000 amp fuse in your backyard! https://www.youtube.com/watch?v=0mGhhdPgXG8&t=775s Doesn't actually require 5,001 amps. It requires 200,000 amps at 3,000 volts. It also marks the return of channel PhotonicInduction, who did this type of thing several years ago, and whom I thought had stopped making videos because he melted his skin off or something.
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Jun 11, 2021 04:14
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BrianBoitano posted:Blowing a 5,000 amp fuse in your backyard! Are those figures right? Where the gently caress is he getting 600 megawatts from?
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Jun 11, 2021 04:37
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Comrade Blyatlov posted:Are those figures right? Where the gently caress is he getting 600 megawatts from? He very slowly charges up huge capacitor banks on regular home power and then dumps it all at once. He shows the two banks that he made for this at 4:18. One thing to watch is the huge cables he's using when they make the connection. They jump not due to any kind of reaction to the arc, but be cause of the electromagnetic forces along the cable due to the massive current flow. -Zydeco- has a new favorite as of 05:06 on Jun 11, 2021 |
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Jun 11, 2021 05:03
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 ok, i gotta see this.
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Jun 11, 2021 05:18
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When I read OP's description of the video, a British accent is the last thing I was expecting.
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Jun 11, 2021 06:18
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Too bad he's the kind of person who calls people snowflakes tho
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Jun 11, 2021 11:17
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His Divine Shadow posted:Too bad he's the kind of person who calls people snowflakes tho My biggest problem is that he always sounds like he's making a fetish video. I don't know if its a bit he's doing and honestly if he gets off whenever something explodes then good for him, but it does mean I'm not eager to watch his videos that often.
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Jun 11, 2021 20:48
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Cat Hatter posted:My biggest problem is that he always sounds like he's making a fetish video. I don't know if its a bit he's doing and honestly if he gets off whenever something explodes then good for him, but it does mean I'm not eager to watch his videos that often. Well, if the shoe fits... It might not be a sexual fetish (Narrator: it totally is), but a fetish nevertheless to burn out huge amps and stuff with that kind of setup.
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Jun 11, 2021 22:19
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https://twitter.com/latestinspace/status/1404165966725066756?s=20 And it's apparently legit. More "near" than "Into" but still. https://www.msn.com/en-us/news/world/odd-green-light-spotted-at-indonesian-volcano-was-a-meteorite/ar-AAKGjyZ?li=BBnbcA1
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Jun 16, 2021 01:38
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AKA Pseudonym posted:https://twitter.com/latestinspace/status/1404165966725066756?s=20 Breath of the Wild predicted all of this
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Jun 16, 2021 01:43
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Isn't this how scientology starts?
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Jun 16, 2021 22:04
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https://i.imgur.com/HFZPfX8.mp4 Turns out that plasma wind tunnels are a thing. This one was built by the European Space Agency to replicate the forces of atmospheric reentry, and one of the main things they use it for is "Does this thing explode or otherwise come apart in a way we need to be concerned about if it comes down over a populated area?"
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Jun 18, 2021 01:51
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Cythereal posted:https://i.imgur.com/HFZPfX8.mp4 
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Jun 18, 2021 06:21
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For those of us who are a bit on the stupid side, what is a plasma wind tunnel ? Which part of a conventional wind tunnel has been replaced by plasma ? How does this replicate conditions of re-entry (which I assume is the purpose of the tunnel) ? Are they just shooting parts of space ships with a plasma cutter ?
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Jun 18, 2021 07:12
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Lady Disdain posted:For those of us who are a bit on the stupid side, what is a plasma wind tunnel ? Which part of a conventional wind tunnel has been replaced by plasma ? How does this replicate conditions of re-entry (which I assume is the purpose of the tunnel) ? They replace the air with plasma. It replicates re-entry because when you hit the atmosphere that fast it turns into plasma.
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Jun 18, 2021 08:20
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cakesmith handyman posted:They replace the air with plasma.  Thanks.
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Jun 18, 2021 14:12
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quote:It is powered by an arc heater of 70 MW maximum electrical power and it is able to generate a plasma jet of up to 2 meters of diameter, at Mach 12, for a test duration of up to 30 minutes. The test gas is a mixture of Air and Argon with a maximum mass flow rate of 3.5 kg/s. Inside the arc, the compressed gas is heated up to plasma temperatures in the range of 2,000-10,000 K. https://www.cira.it/en/research-infrastructures/plasma-wind-tunnels/Plasma%20Wind%20Tunnel%20Complex drat.
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Jun 18, 2021 14:36
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Cythereal posted:https://i.imgur.com/HFZPfX8.mp4 
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Jun 18, 2021 16:26
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AKA Pseudonym posted:https://twitter.com/latestinspace/status/1404165966725066756?s=20 It didn't go in, it just impacted on the surface.
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Jun 18, 2021 18:47
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central dogma posted:Regarding astrophysics chat, I saw a video recently that I can't find anymore. It was a bit lengthy. Basically the narrator took some liberty to suspend disbelief and let us travel in a ship capable of reaching lightspeed. He talked about all the time that would pass on earth the faster you travel. How after a certain time, earth would be unrecognizable if you were to return. Eventually you reach a speed (or distance) where its impossible to even go home because the universe is expanding faster than the speed of light. In fact, you reach a point to where the universe is expanding faster than light in all directions relative to you, so you are, in fact, forever isolated from everything else in the entire universe. Found it! https://www.youtube.com/watch?v=b_TkFhj9mgk Again, I work in genetic engineering, not physics, so I don't know how much liberty the narrator is taking in his explanations, but I thought it was a great video nonetheless. Please watch if you can spare half an hour.
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Jun 18, 2021 19:33
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Also, I'd like to introduce everyone to a nice microbiology channel called Journey to the Microcosmos. No biology background necessary. The microscopy is pretty cool and the narrator's voice is great for sleepy time. This video keeps up with the death/void trend of the last few pages. It seems to be a fairly popular channel, so sorry if it's been mentioned before. https://www.youtube.com/watch?v=oRmbWj2ZITM
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Jun 18, 2021 19:40
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central dogma posted:Also, I'd like to introduce everyone to a nice microbiology channel called Journey to the Microcosmos. No biology background necessary. The microscopy is pretty cool and the narrator's voice is great for sleepy time. This video keeps up with the death/void trend of the last few pages. This episode always makes me sad, amazing channel though. Correction this episode makes me sad https://www.youtube.com/watch?v=ibpdNqrtar0
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Jun 18, 2021 19:46
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Cythereal posted:https://i.imgur.com/HFZPfX8.mp4 came in here to post that thing.  
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Jun 19, 2021 01:27
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central dogma posted:Also, I'd like to introduce everyone to a nice microbiology channel called Journey to the Microcosmos. No biology background necessary. The microscopy is pretty cool and the narrator's voice is great for sleepy time. This video keeps up with the death/void trend of the last few pages. https://www.youtube.com/watch?v=dFCbJmgeHmA
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Jun 19, 2021 03:14
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OwlFancier posted:It's more like it's constantly throwing photographs at your eyes and it takes them 16k years to get there. The thing that's blowing my dial right now, is the realisation that our entire perception of the world works like this. It's entirely retrospective. Any stimulus my brain receives is the result of something that happened in the past. I'm not seeing or hearing things as they happen, but shortly after. It's just the lag time is different. central dogma posted:Also, I'd like to introduce everyone to a nice microbiology channel called Journey to the Microcosmos. No biology background necessary. The microscopy is pretty cool and the narrator's voice is great for sleepy time. This video keeps up with the death/void trend of the last few pages. Thanks for these. I was previously unaware of them, and seem perfect to put on with my kid!
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Jun 19, 2021 14:18
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B33rChiller posted:The thing that's blowing my dial right now, is the realisation that our entire perception of the world works like this. It's entirely retrospective. Any stimulus my brain receives is the result of something that happened in the past. I'm not seeing or hearing things as they happen, but shortly after. It's just the lag time is different. Thanks, I needed some new material to keep me awake at night.
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Jun 19, 2021 14:35
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If it helps then any thinking or comprehension of the things you see is also happening at an indeterminate speed and might also not have happened and you retro-formed a memory of it happening to justify an assumption that already existed in your brain. Also the you that wakes up when you do sleep is arguably not continuous with the one that had trouble sleeping so that's someone else's problem. Try not to worry about it either way because you're wearing your brain cells out if you do and you only get so many of those. OwlFancier has a new favorite as of 14:46 on Jun 19, 2021 |
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Jun 19, 2021 14:44
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So if we could travel faster than the speed of light could we take an amazing telescope far enough into space that we could turn it around and and see any event in history depending on how far we traveled?
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Jun 19, 2021 15:33
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