Geodesic Equation: Lagrange Approximation Solution for Schwarzschild Metric

So there is no reason for the partial derivatives to vanish.In summary, the conversation discusses the geodesic equation and the schwarzschild metric, which can be used to describe the sun. However, the fact that ∂gμν/∂xλ=0 does not mean that the sun has no gravitational effect on test particles, as the metric coefficients are functions of r, one of the xλ variables. Therefore, the partial derivatives should not be expected to be zero.
  • #1
AleksanderPhy
43
0
Hello so if we have geodesic equation lagrange
approximation solution:
d/ds(mgμνdxν/ds)=m∂gμν∂xλdxμ/ds dxν/ds. So if we have schwarzschild metric (wich could be used to describe example sun) which is:ds2=(1-rs/r)dt2-(1-rs/r)-1dr2-r2[/SUP]-sin22. But that means that ∂gμν/∂xλ=0. So that means that first equation will equal to zero so that means that sun has no gravity effect to test particle. But according to my knowledge sun does pull things towards itself.
 
Physics news on Phys.org
  • #2
AleksanderPhy said:
that means that ∂gμν/∂xλ=0.

No, it doesn't. The metric coefficients are functions of ##r##, which is one of the ##x^\lambda##.
 

1. What is the Geodesic Equation?

The Geodesic Equation is a mathematical expression that describes the path of a free-falling particle in a curved spacetime. It is derived from the principles of general relativity and is used to calculate the trajectory of objects moving under the influence of gravity.

2. What is the Lagrange Approximation Solution?

The Lagrange Approximation Solution is a method for solving differential equations, such as the Geodesic Equation. It involves approximating the solution using a series of simpler functions, making it easier to find an accurate solution.

3. What is the Schwarzschild Metric?

The Schwarzschild Metric is a mathematical model that describes the curvature of spacetime around a non-rotating, spherically symmetric mass. It is used in general relativity to calculate the gravitational effects of massive objects, such as stars and planets.

4. How is the Geodesic Equation used in physics?

The Geodesic Equation is used in physics to predict the motion of objects under the influence of gravity. It is commonly used in the study of celestial bodies, such as planets and stars, as well as in the field of cosmology to understand the dynamics of the universe.

5. What are the applications of the Geodesic Equation in modern science?

The Geodesic Equation has many applications in modern science, including in the fields of astronomy, astrophysics, and cosmology. It is also used in the development of technologies such as GPS and satellite communication, which rely on the accurate prediction of the motion of objects in space.

Similar threads

  • Special and General Relativity
Replies
11
Views
178
  • Special and General Relativity
2
Replies
50
Views
3K
  • Special and General Relativity
Replies
9
Views
1K
  • Special and General Relativity
Replies
10
Views
1K
  • Special and General Relativity
Replies
4
Views
2K
  • Special and General Relativity
Replies
18
Views
2K
  • Special and General Relativity
Replies
15
Views
2K
  • Special and General Relativity
Replies
8
Views
1K
  • Special and General Relativity
Replies
1
Views
528
  • Special and General Relativity
Replies
1
Views
912
Back
Top