T = Tsource = 1 second | BLUESHIFT | REDSHIFT | ||

shift z | −0.5 | −0.1 | 1 | 10 |

Distance of B source from A | ||||

| −1.00 | −0.11 | 0.50 | 0.91 |

d: distance of emission of B from O | −0.5 c T | −0.91 c T | ||

| (0.5 c) T | (0.9 c) T | ||

Length traveled by photon B: | ||||

T observed/Tsource = (1 + z) | 0.5 | 0.9 | 2 | 11 |

L: Length traveled using Tobs | c (0.5 T) | c (0.9 T) | 0.5 c T | 0.91 c T |

Difference | 0 | 0 | 0 | 0 |