I recently read about materials that have a reverse reflective index for light.
It is a specially constructed meta-material that bends light in the opposite direction than a normal lens.
Would it be theoretically possible to build a material that could bend gravity in the opposite direction in essence, anti gravity?
It could possibly be done using a very massive rotating object of the proper shape and mass, rotating at a specific velocity, but that is presently impossible at our current level of technology.
But considering things that were one thought impossible are now taken for granted in everyday life, might it someday be possible to design a small device that would accomplish this?
https://www.nature.com/articles/nmat2747
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