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Posts by Volpina‭

3 posts
60%
+1 −0
Q&A Understand intuitively 4th boundary condition of gravitational wave

Suppose we have a gravitational wave which obeys the equation: $[G_{tt}-c^{2}G_{xx}]h_{\mu\nu}=0$ Lets take the case where $h_{\mu\nu}\ne0$ so we are left with the classical wave equation.Suppose...

0 answers  ·  posted 11mo ago by Volpina‭

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Q&A What do eigenfunctions and eigenvalues mean physically?

Lets say we have a mass connected to a spring.Assuming not any friction the ODE which describes the system is $m\frac{d^{2}x}{dt^{2}} = -kx$ We can set 2 Dirichlet boundary conditions $x(0)=0$ an...

1 answer  ·  posted 12mo ago by Volpina‭  ·  last activity 12mo ago by Technically Natural‭

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Q&A How are gravitational waves derived?

Gravitational waves can be derived from the non-linear Einstein field equations and since they are by definition waves they must obey the wave equation: $u_{tt}=c^{2}u_{xx}$ but in General Rela...

1 answer  ·  posted 11mo ago by Volpina‭  ·  last activity 11mo ago by Mithrandir24601‭