By Bernard Schutz

Readability, clarity and rigor mix within the moment version of this widely-used textbook to supply step one into common relativity for undergraduate scholars with a minimum history in arithmetic. subject matters inside of relativity that fascinate astrophysical researchers and scholars alike are covered.

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**Example text**

But it is not the same to everyone, and we must treat it as a coordinate, and make sure that our coordinates cover all of spacetime. Coordinates that do not cover all of spacetime have caused a lot of problems in GR. When we study gravitational collapse and black holes we will see that the usual coordinates for the spacetime outside the black hole do not reach inside the black hole. For this reason, a particle falling into a black hole takes infinite coordinate time to go a finite distance. This is purely the fault of the coordinates: the particle falls in a finite proper time, into a region not covered by the ‘outside’ coordinates.

A) How long does the friend measure the pole to be, as it approaches the barn? (b) The barn door is initially open and, immediately after the runner and pole are entirely inside the barn, the friend shuts the door. How long after the door is shut does the front of the pole hit the other end of the barn, as measured by the friend? Compute the interval between the events of shutting the door and hitting the wall. Is it spacelike, timelike, or null? (c) In the reference frame of the runner, what is the length of the barn and the pole?

Then, if A → (5, 0, 0, 2), we find its components in O¯ by O ¯ 0¯ A0 = 0 0A + 0¯ 1 1A + ··· = γ · 5 + (−vγ ) · 0 + 0 · 0 + 0 · 2 = 5γ . Similarly, ¯ A1 = −5vγ , ¯ A2 = 0, ¯ A3 = 2. Therefore, A → (5γ , −5vγ , 0, 2). O¯ The basis vectors are expressible as β¯ eα = α eβ¯ or e0 = 0¯ 0 e0¯ + 1¯ 0 e1¯ = γ e0¯ − vγ e1¯ . 2 Vector algebra Similarly, e1 = −vγ e0¯ + γ e1¯ , e2 = e2¯ , e3 = e3¯ . ¯ so let us draw the picture (Fig. 1) in O’s ¯ frame: This This gives O’s basis in terms of O’s, transformation is of course exactly what is needed to keep the basis vectors pointing along the axes of their respective frames.