How can nothing be faster than light when speed is only relative?

Question

You always hear this phrase if you watch something about astrophysics ‘Nothing can move faster than light’. But speed is only relative. How can this be true if speed can only be experienced/measured relative to something else?

In: Physics

Answer 1

The speed of light always appears to be the same relative to you regardless of your speed. It’s the exception to the rule. Space-time compensates to make this true to every observer.