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A photon goes from point A to point B, only 1 meter distance apart from each other. A spacetime diagram would show a line connecting points A and B at a 45 degree angle. This can be a right triangle with equal sides, with point C being the corner. The photon seems to have travelled faster along the hypotenuse (2^(1/2) meters) than how we would normally calculate its speed for a distance of 1 meter.

Is this right, or am I missing something here?