Albert Einstein – General and Special Theory of Relativity
First things to consider before this part of the presentation:
Space-time continuum = Space + Time
In longer terms: Space-time is a flexible fabric. Space and time are deeply connected. Space-time is flexible; it is malleable. Space-time is curved when there is gravity, matter, energy, and momentum.
The faster you reach through space, the slower you move through time. (?) https://www.youtube.com/watch?v=KHjpBjgIMVk
Einstein realized that massive objects caused a distortion in space-time. Imagine setting a large body in the center of a trampoline. The body would press down into the fabric, causing it to dimple. A marble rolled around the edge would spiral inward toward the body, pulled in much the same way that the gravity of a planet pulls at rocks in space.
Demonstration: Get a handkerchief; place a heavy object on it. There will be a noticeable “dimple” underneath it. That is the demo of the first part. Second explanation is that, the SM black table things where people use coins and they watch the coins spiral inward to the hole in the middle.
The question “Why does the Earth revolve around the sun?” appears here. Most people would say that the Earth is on its axis or the Sun’s gravity is pulling the Earth in a circle. That is wrong. The correct answer is this: the Sun warped the space around the Earth and space is pushing the Earth toward the Sun.
Einstein knew he’s on the right track, despite it sounds crazy for some people. But he knew he must find a way to prove it. After some time, he was struck by an idea. He figured that if he could shine a beam of light where space is curved then according to his theory, the beam of light would appear to be bent.
As we know it, light only knows straight lines. Light can only travel in straight lines. It is space that is bent. So Einstein thought, “What could have enough gravity to bend light?”
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