Animation - Sagnac effect - The red and blue dots represent counterpropagating signals. The velocity of the signals is the same in both directions. This equalness of velocities constitutes a constant background. The grey dots represent resonators for the signals. Due to the fact that the resonators have a velocity with respect to the background, the signals will have different frequencies.

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Animation - Sagnac effect - The red and blue dots represent counterpropagating signals. The velocity of the signals is the same in both directions. This equalness of velocities constitutes a constant background. The grey dots represent resonators for the signals. Due to the fact that the resonators have a velocity with respect to the background, the signals will have different frequencies.