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Captain Einstein – Experience Relativity in Virtual Reality
- mirimir 8y agoWow. Very cool. And especially cool that they provided video, rather than requiring WebGL. Which I can't risk enabling.
- googlemike 8y agoWhy? What is the risk of WebGL?
- mirimir 8y agoFingerprinting :( https://browserleaks.com/webgl https://browserleaks.com/webgl
- Hydraulix989 8y agoExposure to GPU memory.
- Hydraulix989 8y agohttps://security.stackexchange.com/questions/13799/is-webgl-a-security-concern https://security.stackexchange.com/questions/13799/is-webgl-...
- mirimir 8y agoThis is an alarming Q&A!
- deleted 8y ago[deleted]
- messe 8y agoA slower speed of light [1] is the only game that has ever given me motion sickness, and that was without VR. I'm struggling to imagine what this would do to me. The paper [2] (pdf) has some neat visualizations and introduces the math behind the VR visualization in the form of exercises, left to the reader to work out (thankfully, there are solutions at the end, for the lazy). [1]: http://gamelab.mit.edu/games/a-slower-speed-of-light/ http://gamelab.mit.edu/games/a-slower-speed-of-light/ [2]: http://captaineinstein.org/wordpress/wp-content/uploads/2018/01/1806.11085.pdf http://captaineinstein.org/wordpress/wp-content/uploads/2018...
- thunderrabbit 8y agoA slower speed of light made me sick as well, but this did not. Possible factors: * On this video I was watching on a tiny screen. * On this video, I cannot control the direction of motion. * The change in speed here is very slow and incremental * This video is relatively^^^ha short
- goldenkey 8y agoThirded. Slower speed of light made me feel seasick though I've gone to sea multiple times and never had motion sickness like from the game. Egh..thinking about it now just makes me feel loopy.
- TeMPOraL 8y ago* A slower speed of light tries to render things according to relativity physics, while this video only applies some bending and discoloration to a flat image? That's the reason I didn't enjoy this video as much as I hoped I would.
- notthemessiah 8y agoI was wondering how they approximated the invisible parts of the spectra as it was brought into view. Apparently, they used absorption spectrum of the sky and reflection spectrum of the water. They completely ignored thermal radiation, and made up the color of buildings. All things considered they did well, but I would ideally like to see something like there where you use camera footage from UV and Near and Far infrared.
- everdev 8y agoLooking behind, the landscape turns to black as the light can't catch up to the boat. I didn't think about that effect, but it would create a huge blindspot for a spacecraft. So it wouldn't be much of a dog fight at a fraction of light speed, just get behind the enemy ship and follow them until they slow down enough you can shoot.
- lisper 8y ago> Looking behind, the landscape turns to black as the light can't catch up to the boat. That's not the reason the rear view turns black. Light always travels at the speed of light relative to you. The reason the rear view turns black is that the light is red-shifted into the infrared, which human eyes can't see.
- mbbutler 8y agoI don't think the rear is black because light can't catch up. The craft is moving slower than the speed of light at that point. Is it possible that the rear light has been red shifted so much that it is no longer within the visible spectrum?
- deleted 8y ago[deleted]
- garmaine 8y agoLight behind is red-shifted. It would not be black, that is an error in this video, but rather you would begin to see UV and higher wavelengths that are now shifted into visible. And a spacecraft would presumably have multi-spectral cameras that can see in more than just the visible anyway.
- jacquesm 8y agoAnd you'd assume that a species that has figured out how to travel at those speeds is able to show a display in 'false color' showing it as it should have been rather than the redshifted image. It's a pretty trivial correction if you have the sensor capability.
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- stcredzero 8y agoIf you want to understand relativity, I highly recommend this Minute Physics series! Watching the space/time globe actually gives you an intuitive sense of how it works! All the paradoxes disappear! https://www.youtube.com/watch?v=Rh0pYtQG5wI https://www.youtube.com/watch?v=Rh0pYtQG5wI
- sjcsjc 8y agoThank you. This is brilliant. I now know what Lorentz transformations are. Also, I love the line: "Suppose the speed of cats is constant"
- feiss 8y agoWhy they say Virtual Reality when it's just a 360 video?
- baby 8y agoBevause you can play these with a VR headset and it looks like a rail experience.
- ahelwer 8y agoI remember a while back there was a post by one of Prof. Sussman's grad students on books he (Sussman) recommends[0]. One of the books (improbably[1] prescribed for high school students) was Space and Time in Special Relativity by David Mermin. Does anyone have experience reading this book as a way to learn special relativity? [0] http://aurellem.org/thoughts/html/sussman-reading-list.html http://aurellem.org/thoughts/html/sussman-reading-list.html [1] One of the other books recommended for high-schoolers - Quantum Computing Since Democritus by Scott Aaronson - I found very dense despite having a bachelor's degree (and no small amount of extracurricular interest) in the subject matter.
- mrfusion 8y agoI think this would make a cool augmented reality app for your phone. I’d also suggest showing a clock that slows down relative to real time.
- mrfusion 8y agoI’d be curious why it was downvoted? I think it would do this same effect overplayed on a camera view. You’d need the speed of light to be something like 4 mph and it would do the same effects as the video plus a clock that slows down.
- hrasyid 8y agoWhy did the boat can't stop "becoming light" at the end? Is there a point where you can't decelerate?
- emiraga 8y agoI would point out that this is not completely accurate. Those houses should not be length-contracted, but instead twist-rotated. Rotation that I am referring to is the https://en.wikipedia.org/wiki/Terrell_rotation https://en.wikipedia.org/wiki/Terrell_rotation which comes from a paper "Invisibility of the Lorentz Contraction" by James Terrell. However, to implement this accurately, one would have to combine pixels from multiple frames in order to "see" these houses from different angles and combine those into a current frame. I am not sure how technically feasible this is, especially since those bridges might obscure visibility of some houses from certain angles.