[問題] 光速恆定
光速恆定已經是物理學的基本常識,但是要怎麼解釋這種現象?
假如某輛車以近光速在跑,車頭燈的光不會超光速,車尾燈的光速也不會慢光速,
這要用什麼理論來解釋?
是因為近光速時會造成這輛車的時間變慢的原因嗎?
還是近光速會使這車輛的質量增加,造成空間扭曲?
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