In this paper, some analogies between the Shapiro effect in the solar gravitational field and the Sagnac phase shift have been found. Starting from Einstein equivalence principle (EEP), which states the equivalence between the gravitational force and the pseudo-force experienced by an observer in a noninertial frame of reference, we imagine an observer on a rotating platform immersed in a gravitational field. In the Shapiro effect, for example, we know that the speed of an electromagnetic signal, calculated from the Earth, is less than [Formula: see text], but, if we calculate the speed using a clock at rest in the solar gravitational field, where the photon is passing, we get that the speed of light is [Formula: see text]. Similarly, by considering the fictitious gravitational field of the rotating platform, if we look for a clock with respect to which the signal speed is [Formula: see text], we can interpret the time delay as a gravitational effect.

中文翻译：

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旋转平台上的光速

在本文中，发现了太阳引力场中的夏皮罗效应与萨格纳克相移之间的一些类比。从爱因斯坦等效原理（EEP）开始，它说明了观察者在非惯性参考系中所经历的引力和伪力之间的等效性，我们想象一个观察者在一个旋转平台上，沉浸在引力场中。例如，在夏皮罗效应中，我们知道从地球计算出的电磁信号的速度小于[公式：见正文]，但是，如果我们使用太阳引力场中静止的时钟来计算速度，光子经过的地方，我们得到光速是[公式：见正文]。同样，通过考虑旋转平台的虚拟引力场，