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.
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
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
Kinetic energy or total energy? Assuming the rose weight 10 grams I get that 1.12PJ total energy, but only 0.23PJ is kinetic.
In hindsight I was a bit generous with the weight, I assumed 50g
chonk rose 😳
Only 10MT instead of 50 then?
One ton of TNT is 1E9 calories which is 4 gigajoules. So 0.2 petajoules should be only 50 kilotons of TNT?
A fart in the wind next to the Tsar Bomba. My disappointment is immeasurable and my day is ruined.
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
Impossibly fast and it would have to be coming right at us.
60% of lightspeed, according to another commenter.