Color is a social construct
How fast would the rose have to be going to blueshift that much? Someone please do the math
For a shift from about 700nm to 350nm: coming right at you at 0.6c
It would also have a kinetic energy of about 1.1234 Petajoules, on the order of magnitude of the Tsar Bomba
I don’t know about blue but here is all the math to turn a red light green… Don’t think of doing it though while you could probably get out of a ticket for running a red light I don’t even know what the fine is for driving many thousand times the speed limit is.
Edit: just realized I forgot to post the actual link… https://sciencenotes.org/fast-go-make-red-light-look-green-relativistic-doppler-effect/#:~:text=If we take the speed of light to,to convert to km%2Fhr%2C you get 197%2C640%2C000 km%2Fhr.
To bad the traffic light is in the speed radar’s reference frame, when your licence plate is on the photo I doubt the judge will care that your yellow car is clearly blue in the photo
Actually I think that would then add a additional charge for registration fraud
OK I need someone to explain this to me cause AFAIK light speed is constant no matter how fast moving the source is
Light speed is constant but the apparent frequency and wavelength (which roughly corresponds to what colour we see) change due to the Doppler effect
Fascinating
