The speed of light is invariant. Ship 1 sees 2 coming at .75 C. Ship 2 sees 1 coming at .75 C. Recall that clocks run slower at relativistic speeds. So, no matter how fast you are traveling, the speed of light is always measured as the same relative to you.what if there are two ships coming together 180° apart at 3/4c?
Check out that link I posted on relativistic effects.
I like one illustration I saw in another publication, involving a 30" hole and a meter stick. They are in the same orientation to one another (the hole looks like a circle to the meter stick). They travel in such a way that the meter stick encounters the hole so as to pass through it like being held flat across the hole. The meter stick can fit when it is at the correct speed, as it's length will have contracted just shy of 30".
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