# Question

In a gedanken experiment (Fig. 26.17), two events that cannot be related by cause and effect occur in the same inertial reference frame O: (1) Strobe light A, at the origin of the x- axis, flashes; (2) strobe light B, located at x = + 600 m, flashes later. B’s flash 1.00 μs later. B’s flash cannot be caused by A’s flash. (Light travels only 300 m in the time between the two events.)

(a) Use qualitative arguments to show that there exists another inertial reference frame, traveling at a speed less than c, in which these two events would be observed to occur simultaneously.

(b) What is the direction of the velocity of the reference frame in part (a)?

(a) Use qualitative arguments to show that there exists another inertial reference frame, traveling at a speed less than c, in which these two events would be observed to occur simultaneously.

(b) What is the direction of the velocity of the reference frame in part (a)?

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