Suppose you can Accelerate the rotation of the earth so that the day is only half the long? What would happen? At the beginning we would have to make modern clocks, which only have an hour from 1 to 6 for AM and PM. If you had tickets for the concert at 8 o’clock, you would not be lucky: it no longer exists.
But maybe the more livid question is: why do physicists ask such nut questions? It will never happen – just go on, right? Here is the offer. Thinking about counterfactive scenarios gives us an insight into how things work here in reality. Plus, that’s fun! Do I have to say more? Ok, it can even aid us build an elevator in a working space.
Oh, you don’t know what a space elevator is? This is the basis of science fiction, imprisonment from Earth to an orbiting space station in geosynchronous orbit. A car from cables would drive up and down, just like an ordinary elevator. Basically, it is a way to go into space as easily and routinely as you go to the office in the morning – does not require rockets.
Let’s start with a few basic questions and prepare more complicated physics.
What is the day?
You can’t be more basic. But the answer is not uncomplicated. If you said that the day is 24 hours, you are right – and bad. If you are standing outside, the time when the sun is at the highest point in the sky is called local noon. If you stand there until the next local South, the amount of time is defined as 24 hours. So the hour is 1/24 between two local south.
But wait! It’s not the same as the full land revolution. If you have measured the time of full revolution, you’ll find that it is so NO Exactly 24 hours. The reason is that the Earth does two things at the same time: it spinning on its axis, which causes the sun to move in the sky. But during the year there is also a circle of sun, which means that complete rotation will not cause the sun to be in the same position in the sky.
In fact, there are two different types of days. . Bright day He is the one you think about, and this is described above. The second type is called Daytime. This is completely out of the diagram scale that will aid you understand the difference: