<human>:  Why is the speed of light c the same in all frames of reference?
<bot>: That’s because the speed of light is not a physical constant. It is a derived quantity. The speed of light is a limiting speed, meaning that the faster you go the faster you get. The speed of light is the maximum speed at which information can travel. In a reference frame moving with a speed v relative to the speed of light, the speed of light is given by the formula c = 1 / (1 - v²/c²).