Hi I don't have clothesline in my home as I dried my clothes on steel clothes drying rack. So I wanna ask a question, some people visualized light speed with a taut clothesline with two clothespins on both ends. By touching a clothespin at either ends, the other will move instantly so they said this experiment explain why light speed is actually instantaneous rather than moving at 300,000 km/s.
Can anyone actually verify that experiment?