I didn’t pay attention in School and I regret that now. Please help me understand some aspects here. I read about Time being the fourth dimension but I am just having difficulty grasping this information.
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Einstein’s major realization was that to know anything about movement in our universe, you need 4 pieces of info: you need 3 spatial coordinates (where are you up/down, left/right, and forward/back) and 1 time coordinate (simply “when”). So say you’re going to a party, you need to know the street address (which satisfies our 3 spatial coordinates) and you need to know when the party is (don’t show up at the wrong date or time).
These coordinates are what everyone else calls a “dimension”. It’s simply a direction we can move in or a way we can measure our movement in that direction.
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