Recent content by Bosko

Where? Question 1 or 2 ? How ?

I didn't find anything relevant to question 2

How the gravitational pull of object B "knows" where object A is and vice versa. The path of light is "straight" in curved space-time. I understand your post but I don't understand how that direction can be determined

Why?

The direction should be orthogonal (at 90 degrees) to the gravity wave front. Both electromagnetic and gravitational waves move at the same speed through the same curved space-time.

Reading the article, GRAVITY BENDING GRAVITY: ARE ANY OF THE O3A LIGOVIRGO DETECTIONS GRAVITATIONALLY LENSED? I think about the following two questions: 1. Gravity bends light and all other electromagnetic waves. Does it also bend gravitational waves? 2. Does gravity change the direction of...

Space-time is a coordinate system. There are 4 numbers for each coordinate. Three for space and one for time. Some laconic answer would be that, like any coordinate system, it consists of points. In the theory of relativity, these points (four numbers) are called events. If you're looking for a...

Time and space as separate categories are a relic from the time before the theory of relativity. These are philosophical questions from 120 years ago. Now they don't make sense because space and time are not basic concepts. You should define more precisely what it means that something exists...

In my opinion two parameters are needed: p - the probability that the first (red) player wins on his serve q - for the other player (blue) to win on his serve Of course: 1-p and 1-q are the corresponding "loss" probabilities Here (tennis.svg) is a graph drawn in Inkscape (SVG format) if...

In general, if you have a system of differential equations with the property that space-time must be smooth everywhere, then a solution that is not smooth everywhere is suspicious. The only thing I found that has no proof in Schwarzschild's solution is: That a massive spherical object can be...

@PeterDonis, @Dale Thank you.

Look definition of the coordinate chart .

Is not with the Schwarzschild coordinates. If I understand you correctly, this would violate the very definition of the coordinate chart because of the diffeomorphism property .

Why is not ? Ok It should be smooth everywhere You are using a circular argument.

{Mentor’s note: split from https://www.physicsforums.com/threads/does-kerrs-argument-against-singularities-apply-to-all-black-holes.1061139 } However, a simple mathematical-logical problem remains: Einstein's field equations are a system of differential equations. Their solution should be...