Follow Slashdot blog updates by subscribing to our blog RSS feed

 



Forgot your password?
typodupeerror

+ - Experiments Reveal That Deformed Rubber Sheet Is Not Like Spacetime-> 1

Submitted by KentuckyFC
KentuckyFC writes: General relativity is mathematically challenging and yet widely appreciated by the public. This state of affairs is almost entirely the result of one the most famous analogies in science: that the warping of spacetime to produce gravity is like the deformation of a rubber sheet by a central mass. Now physicists have tested this idea theoretically and experimentally and say it doesn't hold water. It turns out that a marble rolling on deformed rubber sheet does not follow the same trajectory as a planet orbiting a star and that the marble's equations of motion lead to a strangely twisted version of Kepler's third law of planetary motion. And experiments with a real marble rolling on a spandex sheet show that the mass of the sheet itself creates a distortion that further complicates matters. Indeed, the physicists say that a rubber sheet deformed by a central mass can never produce the same motion of planet orbiting a star in spacetime. So the analogy is fundamentally flawed. Shame!
Link to Original Source
This discussion was created for logged-in users only, but now has been archived. No new comments can be posted.

Experiments Reveal That Deformed Rubber Sheet Is Not Like Spacetime

Comments Filter:

Each new user of a new system uncovers a new class of bugs. -- Kernighan

Working...