Hi
I’ve been studying pharmacy/medical sciences for all my adult life when i stumbled upon “a brief history of time” by stephen hawking
Anyway,for a person who hasn’t studied physics much..how does “spacetime” exist? I mean einstein abandoned the idea of absolute time
But what is spacetime? And how does time exist as a physical dimension? I mean it’s just something we measure as it passes
How does all this exist?
In: 3
People usually think of space of having three dimensions: length, width, height.
Spacetime extends that to four dimensions: length, width, height, and time.
In the olden days, treating time as something different from space didn’t matter, because the rate that time passed was seen as constant.
Then along came this dude called Albert Einstein, who proved that that rate at which time passes *changes* depending on how fast you are traveling *through space* (your velocity) relative to someone else. In physics, this is called Special Relativity.
So, basically, instead of space being one thing and time being another unrelated thing, Einstein showed that space and time are inextricably intertwined and should be treated as one thing (instead of two). He called that one thing “spacetime.”
It’s not “space.” It’s not “time.” It’s two things that work together as one.
Like a Reese’s Cup. Spacetime is like a Reese’s Cup. Two great tastes that taste great together.
Bam! There ya go.
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