Someone help me with this

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How can we visualize 4D spacetime and how gravity plays a role in 4D spacetime??
 

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Chris Hillman
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How can we visualize 4D spacetime and how gravity plays a role in 4D spacetime??
This is a FAQ; did you try searching for previous PF threads? This very question was discussed as recently as a few days ago.
 
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If you take and combine two of the spatial dimensions say z and y then have time be your third dimension on a graph it is pretty easy. Its used in a lot of examples and what not in books.
 
How can we visualize 4D spacetime and how gravity plays a role in 4D spacetime??
We can't visualise it we don't visualise in 4D. But here are models to help us understand.

http://images.google.co.uk/imgres?imgurl=http://universe-review.ca/I11-05-emzyme.jpg&imgrefurl=http://universe-review.ca/F18-index.htm&h=358&w=700&sz=49&hl=en&start=1&tbnid=oFXjw1X514vC5M:&tbnh=72&tbnw=140&prev=/images?q=Modelling+time+and+space+minkowski&svnum=10&hl=en&sa=X

Choose gravity.

General realtivity/special relativity etc.
 
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