Eli5: why is time considered to be the fourth dimension
In: Physics
For orientation in dimensions we use coordinates.
If you want to meet with someone at some place you give him coordinates.
You give them longitude, latitude, but that’s not enough, is it? What if the place has many floors above and below the ground. So you add height.
Now you have clearly picked the location. But is that enough to plan a meeting? It’s not. The question to answer is when.
You have to give specific coordinate in time to successfully meet. Otherwise you could come tomorrow and they could come next year.
So this would suggest you need 4 coordinates to successfully meet someone somewhere. And 4 coordinates mean 4 dimensions.
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