Comment by lupire
2 years ago
Ratios only matter in vibrations (frequencies) because the vibration is a non-uniformity within a period. Translational speed isn't like that.
The main point of special relativity (Lorenz transform) is that it is a mapping between [0, c] and [0, infinity], so ratios to speed of light are not absolutely definable. Light has infinite speed in its own reference frame.
> Light has infinite speed in its own reference frame
This also means that from the perspective of photon, everything happens instantaneously.
"You took 5 billion years to get here, dinner is cold"
"But I swear I just left!"
> Light has infinite speed in its own reference frame.
Or alternatively, light doesn't have a reference frame.