Special relativity:
-speed of light is constant in a vacuum for all observers.
1)time dilation->the faster u go the slower the time ticks
2)length contraction-> when something is moving towards u..it's length is measured shorter
3relativity of simultaneity-> different observer see things differently.
4)energy can be converted to mass.vice versa
Relativity:
1)gravitational time dilation..
nearer to earth time ticks slower
2)light rays bend in gravitational field
3)universe is expanding
4)frame dragging..4 dimensional space where mass move together with it
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