How is Einsteins idea of space and gravity different from Newton's?

Answer 1

Newton's Idea of space was a fixed arena where all events played out all in a single refrence frame. For Newton, space and time were absolute. Einstein theorized and others later proved that all observers are in their own frame of reference and motion through space is observed differently for different observers. Even space itself was able to be warped or bent. No longer was space a backdrop for all events to take place in or for matter to exist in, now it was a dynamic and key player in events. I'll be briefer with gravity. Newton decribes gravity as a force where Einstein said it was simply a warping, or indention created in space-time by the mass of an object which tends to cause matter or waves to follow this warped bowl likw path when near an objects gravitational influence.

Answer 2

I agree with akamascients' comments.

Another way to look at the difference:

In Newtonian gravity, space is a fixed, flat, 3-dimensional background geometry. Gravity can be described by a scalar potential, which is to say that everything about gravitational force can be calculated from a field that has a single number (representing the gravitational potential energy) at each point in space.

In Einsteinian gravity, space is described by an arbitrary 4-dimensional coordinate system that is not flat---the geometry is locally curved, and this curvature is described by tensor fields, which is to say a whole tensor at each point in space. A tensor is a geometric entity that has several dimensions and is usually represented by one or more matrixes of numbers. "Geometric entity" means that its properties transform in such a way as to be coordinate-system invariant. Gravity is also represented by a tensor field, that depends on both the curvature of the space and the distribution of stress-energy. Stress-energy is a generalization of mass to include all forms of energy.

Einsteinian gravity is way more complicated than Newtonian gravity, and much harder to calculate things.

One big difference is that for Einstein, the energy due to gravity can also be a source for gravity. This means that the equations can become non-linear: gravity causes more gravity, which causes even more gravity, until, for example, you get a black hole singularity.

There are Newtonian and post-Newtonian theories of gravity and light where the path of light is bent by gravity; these theories do not give the same amount of bending as General Relativity, however.

Answer 3

As for as the gravity goes Newton's theories are followed even now. Einstein has not improved or disproved any of the newtons theory of gravity.

Answer 4

Quick simple: Newton said bodies attract each other, his idea of gravity. einstein says that if you think of space-time as a stretched out blanket and you put a basket ball in the middle...., that warping that the basketball creates in the blanket is space. Throw a tennis ball on the blanket and that warping or "Gravity" will pull the tennis ball towards the basket ball.

Answer 5

Newton's concept of Gravity isn't consistant with specific relativity. In Newton's concept, the fee of suggestions is infinity, case in point, in case you have 2 discrete hundreds, they charm to one yet another rapidly, no count what the gap between them, and, in case you alter the coordinate of one of those debris, the different might comprehend it rapidly. even nonetheless, as far as specific Relativity is worried, no suggestions could nicely be conveyed quicker than velocity of light, for this reason, Newton's concept isn't consistant with specific Relativity. Einstein's concept of Gravity is %one hundred consistant with specific Relativity. certainly, you are able to still think of Einstein's concept as corrected version of Newton's concept. Even geometrically, Newton's and Einstin's techniques yield spacetime as a 4D manifold, and Newtonian Gravity provide upward thrust a curved Spacetime, so, curvature of spacetime isn't the main effectual distinction of those theories. the main effectual distinction is the consistancy with specific Relativity.

Answer 6

Simply stated, Newton didn't think that gravity could bend light. It was Einstein's understanding that gravity could bend light which formed the basis for the significant diffences between them.
Everything else followed from that.

Answer 7

Look at their pictures: Newton's hair flowed down from his head. Einstein's (sort of) defied gravity and pointed up, towards outer space. One can easily see why they were influenced.

Answer 8

Newton says that bodies naturally attract other bodies (like magnets, except they never repel). Einstein says that bodies actually warp the "fabric" of space. This warpage creates the attraction.

Answer 9

Einsteins idea is based on mathematical formula, Newtons is based on relativity.

Answer 10

EINSTEIN SAY'S THAT EVERYTHING IS RELATIVE TO EACH OTHER. NEWTON SAID WHAT GOES UP MUST COME DOWN WHICH DOES NOT APPLY TO OUTER SPACE.