What causes gravity according to Einstein?

GETTING A GRIP ON GRAVITY Einstein’s general theory of relativity explains gravity as a distortion of space (or more precisely, spacetime) caused by the presence of matter or energy. A massive object generates a gravitational field by warping the geometry of the surrounding spacetime.

Where can I find Einstein tensor?

The Einstein tensor is defined as G μ ν = R μ ν − 1 2 g μ ν R . .

How does space time curvature cause gravity?

The curvature of spacetime (not just space) is responsible for gravity. Literally, near heavy objects, the “future direction” points slightly down. So anything that moves forward in time will find its trajectory pointing down slightly. This takes the form of downward acceleration.

What did Einstein discover about gravity?

Einstein did. He theorized that a mass can prod space plenty. It can warp it, bend it, push it, or pull it. Gravity was just a natural outcome of a mass’s existence in space (Einstein had, with his 1905 Special Theory of Relativity, added time as a fourth dimension to space, calling the result space-time.

What explanation does General Relativity provide for gravity quizlet?

What explanation does general relativity provide for gravity? Gravity is the result of curved space time.

How many equations did Einstein create?

ten equations
What Does It Mean? The Einstein Field Equations are ten equations, contained in the tensor equation shown above, which describe gravity as a result of spacetime being curved by mass and energy.

What is Einstein’s constant?

In cosmology, the cosmological constant (usually denoted by the Greek capital letter lambda: Λ), alternatively called Einstein’s cosmological constant, is the constant coefficient of a term Albert Einstein temporarily added to his field equations of general relativity.

What is the stress energy tensor in general relativity?

In general relativity. In general relativity, the symmetric stress–energy tensor acts as the source of spacetime curvature, and is the current density associated with gauge transformations of gravity which are general curvilinear coordinate transformations. (If there is torsion, then the tensor is no longer symmetric.

What is the divergence of the non-gravitational stress-energy?

The stress–energy tensor is the conserved Noether current associated with spacetime translations . The divergence of the non-gravitational stress–energy is zero. In other words, non-gravitational energy and momentum are conserved, When gravity is negligible and using a Cartesian coordinate system for spacetime,…

Why don’t we include higher-order corrections in the energy-momentum tensor?

We do not include higher-order corrections to the energy-momentum tensor because the amount of energy and momentum must itself be small for the weak-field limit to apply. In other words, the lowest nonvanishing order in T is automatically of the same order of magnitude as the perturbation.

Is the stress–energy tensor perfectly symmetric?

In some alternative theories like Einstein–Cartan theory, the stress–energy tensor may not be perfectly symmetric because of a nonzero spin tensor, which geometrically corresponds to a nonzero torsion tensor . Because the stress–energy tensor is of order two, its components can be displayed in 4 × 4 matrix form: