- #1

- 1,067

- 91

What will you say to save the THEORY!

You are using an out of date browser. It may not display this or other websites correctly.

You should upgrade or use an alternative browser.

You should upgrade or use an alternative browser.

- Thread starter rudransh verma
- Start date

- #1

- 1,067

- 91

What will you say to save the THEORY!

- #2

Mentor

- 14,318

- 8,330

The curvature in general relativity is curvature of four-dimensional space-time, not three-dimensional space. We humans aren't very good at visualizing four-dimensional shapes :) so you won't find any good pictures. However, the thing you need to know is that the curvature is the same in all directions heading out from the Earth - the standard solution (google for "Schwarzschild metric") for the gravitational field of a massive sphere like a star or a planet is spherically symmetric, meaning thatthe curvature at any given point is a function of the distance from the center of the Earth but not the direction.

- #3

Science Advisor

Gold Member

- 3,969

- 327

- #4

Mentor

- 34,085

- 11,860

The theory does not need saving. Misunderstandings about a theory do not constitute a challenge to the theory, merely an educational opportunity for the person with the misunderstanding.What will you say to save the THEORY!

- #5

- 1,067

- 91

actually yes pictures are very misleading.

The curvature in general relativity is curvature of four-dimensional space-time, not three-dimensional space. We humans aren't very good at visualizing four-dimensional shapes :) so you won't find any good pictures. However, the thing you need to know is that the curvature is the same in all directions heading out from the Earth - the standard solution (google for "Schwarzschild metric") for the gravitational field of a massive sphere like a star or a planet is spherically symmetric, meaning thatthe curvature at any given point is a function of the distance from the center of the Earth but not the direction.

- #6

Science Advisor

- 11,842

- 3,114

Try the videos in this post:actually yes pictures are very misleading.

https://www.physicsforums.com/threads/spacetime-and-gravity.773923/#post-4869349

And note that "space" here is always the radial direction. So "upwards" is always away from the the center of Earth, no matter where on the Earth you are.

- #7

- 1,067

- 91

- #8

Mentor

- 14,318

- 8,330

Keep at it... The hard part isn't the theory, it's recognizing the unconscious classical assumptions that we make about how the world works so that we can retrain our intuition.

- #9

Science Advisor

- 11,842

- 3,114

Yes, some simple scenarios, which involve just 2 of the 4 space-time dimensions can be visualized in one diagram. Others require multiple diagrams.

Share:

- Replies
- 15

- Views
- 908

- Replies
- 1

- Views
- 666

- Replies
- 32

- Views
- 452

- Replies
- 5

- Views
- 432

- Replies
- 1

- Views
- 728

- Replies
- 55

- Views
- 2K

- Replies
- 2

- Views
- 472

- Replies
- 10

- Views
- 746

- Replies
- 15

- Views
- 634

- Replies
- 17

- Views
- 1K