- cross-posted to:
- funny@lemmy.ml
- cross-posted to:
- funny@lemmy.ml
cross-posted from: https://lemmy.ml/post/19504984
It’s all relative
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Color is a social construct
Well, the names for different parts of the color spectrum are, I suppose. Wavelength of EM radiation, and how your brain interprets it as color, is ‘real’.
I think they were alluding to a different use of the word color.
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
Chill, Spock.
deleted by creator
Which is achieved by spacetime dilation which can in turn stretch or compress the light waves.
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
60% of lightspeed, according to another commenter.
Impossibly fast and it would have to be coming right at us.
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
Speed chills
Speed kills, coming down the mountain
Speed kills, coming down the street
Speed kills with presence of mind
Speed kills, if you know what I meandeleted by creator
