But…the passage of time. this affected the universe a long time before critters existed.
so time, under whatever construct still took place prior to us homosapiens.
I think.
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Ah, so to arrive before you left, you need to travel faster than light. That jives with relativity (I think).
Its a matter of acceleration. But I think you have to accelerate so fast you end up going SoL. So yes.
And the thing with the speed of light is not relativity. But Kinetic Energy (KE) and E=MC^2
I’m going to assume you’re interested.
Matter and energy are the same thing. Just in different forms. This is the formulare E=MC^2: Energy = Mass x SoL^2
The more energy something has, the more mass it has. KE is a measure of energy related to movement / speed. More speed - more energy - more mass.
Lets say a 1kg ball starts with 0 KE. But we push it to 50% speed of light. It would gain enough energy to weigh 1.3kg. Not huge. But because the ball now has more mass - it takes more energy to speed it up. So the same amount of energy that pushed it to 50% light speed would only add another few % the speed. To go 90% the speed of light the ball would weight 172kg.
And this continues. Until you get to the speed of light. Where the object you are pushing becomes so heavy it requires infinite energy to go faster. So its impossible.
Light and other “mass less” objects can reach the SoL as they have 0 mass. And so require 0 energy to move. Perverse quantum physics stuff is that.
What relativity say is someone/thing going super fast will experience time at a much different rate to the rest of the universe. In fact ALL travellers experience time differently.
Speed is relative. But is also a derivative of distance and time (S=D/T). So either distance or time is relative to the observer. As distance can not relative. It is fixed, time must be relative.
https://www.scienceworld.ca/stories/cosmic-speed-limit-why-cant-we-travel-light-speed/
FYI the guy he calls Jim is this Jim Al-Khalili. A BRILLIANT guy to look up if this takes your fancy.
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damn, @carlbm - the stuff I learn on this website…
I’ve read/heard/discussed relativity may times in my life, but never had it been explained to me that way.
Thanks ~
by the way - what ARE your thoughts on Einstein?
Brilliant. Not only a physicist BUT he had 2 special features.
He knew of the first saying “I have no special talents. I am only passionately curious.” - so true. He wanted to know everything. Everything was a puzzle that had a solution and he wanted to solve them all.
And his ability to think a problem out. How he proved gravity bends space. Or the theory of relativity. He would think of the ways to prove things with out maths. Like the light video above. That was HIS thought experiment. From the 1940’s. Its still the BEST display of space time we know of.
Einstein is so not a controversial figure in our history. Few people have an issue with him outside of his work on planning the atomic bomb.
And that makes me uncomfortable, so intellectually I have to provide some pushback.
I am obviously not a physicist, so I have no real input into his work, but I have to feel like he was in the right place at the right time, kinda thing.
Is that weird?
Are you saying that you think people should consider his ethical input in the the Atomic Bomb?
Its weird. Science is amoral. It provides us with what and hows. E=MC2 is the corner stone of modern science (or some of it). With out this we would not understand so much. So whilst it was used to make the A bomb it will also be used to make fission reactors that will provide clean energy or maybe anti matter reactors which might fuel us for ever.
No, not at all, I was just commenting on the only thing that I could have thought of that could be controversial in regards to him.
My point was that, although I am not an academic in any way, that whenever history holds a person to such high esteem, it gives me pause.
That’s all.
He was a very modest man. He was offered the presidency of Israel and turned it down. Saying he could not do that an all the other jobs.
He is attributed with the quote:
“Everybody is a genius. But if you judge a fish by its ability to climb a tree, it will live its whole life believing that it is stupid.”
But its likely this was not him. Although it is testimony to the his overall views that people say it is.
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Okay, now I’m confused… how did at thread about some sleazy marketer’s claims turn into a thread about theoretical physics???
To bring it back to topic, something I read recently made me think of this thread.
paraphrasing somewhat but
“With age comes the knowledge that everything is a waste of time. With wisdom comes the understanding that wasting time can be a wonderful thing”
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That’s kinda how we roll here at T Nation, little one.
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Reminds me of a discussion I had with a guy who perfectly explained the difference between knowledge and wisdom:
Knowledge is knowing that tomato is a fruit, but wisdom is knowing that if you put it in a fruit salad it’s gonna taste like shit.
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Let’s have this discussion again in decade 
@Edgy Einstein would have been the first to say he stood on the shoulders of giants but really the key to his theories were staring us in the face for hundreds and hundreds of years. It was a very special mind that uncovered what he did.
Before Einstein, the theories were clunky and we had some really whacky ideas as to why the universe wasn’t behaving the way we said it should behave.
And if you’re still not sure, here is how Einstein said academics should handle being dragged infront of the court by the government under the threat of loss of livelihood and/or freedom
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Wit is knowing that you can get away with a tomato based fruit salad if you call it salsa.
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Any conventional salad with tomatoes in is technically a fruit salad.
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Nah bro, that’s just a salad with fruit. A fruit salad is exclusively fruit.
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Now don’t get me started on Girl Scout cookies…
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This has been my point for many years - what did he “discover”? He was able to discuss concepts that have been known for ages, but made them more understandable for us laymen?
I never meant this to devolve into a Einstein Hate Thread, so I apologize if this is what is happening…
So weird - I always thought I’d seen Event Horizon. Realized last night I hadn’t seen it. Watched it with the wife. Sci-Fi Horror is the tits, man.
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