Views : 316,686
Genre: Science & Technology
Date of upload: May 21, 2023 ^^
Rating : 4.824 (381/8,265 LTDR)
RYD date created : 2024-05-19T04:27:20.146438Z
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Top Comments of this video!! :3
There's an uncertainty in the title. It allows for the interpretation that the fundamental cause of existence of light resides in gravity, somehow. The presentation states that some processes related to gravitational waves can lead to generating photons, wich is a much weaker statement. It's kind of saying that turning the light on is the reason photons exist. :)
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Correction.
Alan Guth inflationary theory proposes that the universe expanded in the inflationary period from a plank size to the size of a nugget, effectively in an expansion rate where 2 points separated at speed faster than light (not to the current size as said in this video).
Then from nugget size kept expanding but according to the standard big bang theory
Very nice video, I enjoyed the explanations and the animations, pretty cool 🙂👍
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Hey Dr. Ben Miles, your videos are amazing and you deserve more recognition. Can you please do a video on the recent discovery of the James Webb telescope that found a possible galaxy that formed only 1 billion years after the Big Bang. Not sure how accurate that is so don’t quote me. But I would be very interested.
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07:00 "Two particles that were an atom's width apart before inflation would have been more than a thousand lighyears apart <after>." Even if the arithmetic per se may be sound, this is a bit confusing, and maybe even misleading. Since we are putting things in perspective, I take it the calculation is hypothetical, because, within the theoretical framework of inflation, there were no particles prior to inflation, and if there had been, the universe was so dense that no two particles could have been much more than a planck length apart. The width of an atom is between 1,000 and 10,000 times that of a proton, which is 10^20 times a planck length. (I'm disregarding the bewildering possibility that the universe might have been infinite already prior to inflation.)
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inflation does not EXPLAIN why the Universe expanded quickly at first. It is only used to create a theory consistent with most parameters we observe today. MOST not all. The quick expansion is a postulate to explain the other things not the rapid expansion per se. and it does not explain ALL, there is a lot of problems that still remain.
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I've always figured the expansion wasn't so much about space extending outward, but rather inward. The so called "bang" was more like an implosion where the resolution of space increased. Like Planck scale increased, analogous to a centimeter growing more notches of measure, say 100x more notches yet within the same length of the original centimeter. So there same effect, kinda sorta, but with the understanding we still live inside a small singularity type sized space. That the space within grew, and that's a subtle difference. Purely speculative, off course, but it does help fit some of the vacuum energy conundrums this research paper attempts to tackle. I like this theory because it's a novel way to think about the topic.
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I have no idea what I'm talking about but in terms of visable light, i learned somewhere that its due to whatever particle being a high enough energy level that that it can't "contain" whatever energy exterted upon it without releasing it as visable light. Something like wood emitting no visable light but coals emit visable light because they are at or are releasing a higher energy level.
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@DrD0000M
1 year ago
Nothing can be heavy if nothing is light.
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