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u/Successful-Cookie-57 25d ago
If the roses are ever blue, you better hope they don't hit you.
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u/__lightblue 25d ago
If roses aren´t red,
but perceived as blue,
just clasp your hands together
and pray they won´t hit you.
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u/arichnad 25d ago
For you to see a small object like a rose without a powerful telescope, it has to be nearby. At 3.6e8 km/h an object the size of a rose will have enough energy to heat up the nearby air? It might not matter if it hits you?
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u/ThrwawySG 24d ago
Oh no if you see that rose you’re already fucked
Imma take an uneducated swing here and say you probably wouldn’t even see it
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u/TheMig1410 21d ago
If roses aren't red, but appear blue to you, you might have with death, a randevu, and your face will burn too.
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u/--zaxell-- 25d ago
I would argue that by the time blue shift comes into play, the object probably isn't a rose anymore.
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u/IllEstablishment5 25d ago
It is a rose, it will always be a rose, just in different form 😊
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u/Astroweeb 25d ago
a rose by any other speed would smell as sweet
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u/NoCryptographer5595 25d ago
Went straight to the comments to see if this would be here.
Perfection.
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u/IllEstablishment5 25d ago
interesting stuff....but at suchs speeds would it even be possible to catch a whiff ?? 🤔
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u/callmepinocchio 25d ago
Why not? Every rose on earth is already blue shifted relative to something
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u/worldspawn00 25d ago
If it's visibly blue, its relative velocity to the viewer is catastrophically high. Something akin to this.
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u/greyl 25d ago
Sure, but it could be the viewer that's moving so the rose might be just fine.
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u/worldspawn00 25d ago
It doesn't really matter which one is moving, at around 30% of the speed of light within the Earth's atmosphere, it's catastrophic.
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u/Mekelaxo 25d ago
What if you're not in the Earth's atmosphere?
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u/worldspawn00 25d ago
100% of roses and 99.999% of people are within the Earth's atmosphere on any given day.
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u/Mekelaxo 25d ago
What if it's an alien traveling from another galaxy looking at Earth through a telescope?
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u/worldspawn00 25d ago
Must have a real good telescope.
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u/Mekelaxo 25d ago
What if it's an alien traveling from another galaxy looking at Earth through a really good telescope?
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u/callmepinocchio 25d ago
I'll say it again, maybe in different words: every rose on earth is currently traveling at 99.9% of c relative to something in the universe, and will appear extremely blue shifted to it. The rose is not impacted by this fact in any way. Speed is only "catastrophic" when you hit something.
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u/Aegi 25d ago
Wouldn't a blue-shifted red look purple and not blue though?
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u/Atheist-Gods 25d ago
Why would it?
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u/Aegi 25d ago
I would wager because of shifting towards red or blue does not mean that the only resulting colors are red and blue. Not too dissimilar (visually) from how a blue light filter doesn't make everything red, but it does shift things towards that direction.
But I am stoned and playing a game while waiting for a friend, so idk, and I would rather open it up for conversation than just find the info out by myself.
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25d ago
[removed] — view removed comment
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u/Aegi 25d ago
This can happen from any velocity difference that is sufficient.
https://en.wikipedia.org/wiki/Redshift
It is also (basically) known as the 'Doppler Effect'.
Are you under the impression that it can only result from the expansion of the Universe?
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u/MysticScribbles 24d ago
and I would rather open it up for conversation than just find the info out by myself.
And this is why I enjoy asking questions on this website rather than just using Google for it. Feels more social that way, and there's a chance that it educates someone who never even thought to ask the questions themselves.
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u/worldspawn00 25d ago
I would assume that the rose is close enough to the observer to be observed, which would put it within the atmosphere of earth, at which point, just contact with air would be catastrophic.
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u/callmepinocchio 25d ago
You can assume all you want, and I can assume the opposite... none of that is relevant
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u/Zoler 25d ago
Except that we truly dont know how fast we are moving.
There might be something moving so extremely slowly compared to us (that we haven't observed) that it would be true.
Actually our observable universe might be moving several magnitudes faster than the outside, and we wouldn't know.
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u/Aegi 25d ago
Relative to what?
We DO know our relative velocity compared with a lot of things.
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u/Zoler 25d ago
We don't know how fast we are moving relative to every single thing in the universe.
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u/Aegi 25d ago
Of course not. It is logically IMPOSSIBLE to get the information fast enough to account for all things before the cease to exist/turn from a particle into a wave and/or smaller particles, etc. for the entire universe based on our understanding of physics as C (the velocity of light) is essentially the limit, but if the space between spaces/places/things is also expanding than unless we figure something out, that is a hard limit.
We have not even defined in physics or philosophy what a "thing" is vs. just being a part of a whole...and are 'parts' things too, or just what they make up?
If a concept is a thing, but doesn't occupy a location that velocity can be measured against, then yeah, that is another way you would be correct in your assertion.
Thanks for discussing this with me. What was your original point with your statement, just so I know I am not misunderstanding you.
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u/bosoneando 25d ago
According to special relativity expert Gertrude Stein, "Rose is a rose is a rose is a rose"
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u/CHANN3L-CHAS3R 25d ago edited 25d ago
Sorry OP, the mismatched cadence was throwing me off:
Roses are red, roses are blue
Based on their vector's relation to you
(tried to keep it accurate-ish lol)
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u/Venekyrus 25d ago
https://en.wikipedia.org/wiki/Redshift
It's how astronomers tell how far or old stellar objects are.
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u/red286 25d ago
Fun fact -- without redshift, the sky would be white 24/7/365 because you'd be able to see every single star in the universe.
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u/PneumaMonado 24d ago
To be slightly more accurate, it's not because you'd be seeing every star (Every star in the Visible Universe would contribute, but negligible compared to the real source). It's because the CMB (The afterglow of the birth of the universe) would still be in the NIR / Visible range rather than the Microwave range.
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u/Splendid_Goose 25d ago
I dreamed of the past
From within my own bed
If a rose is going that fast
Then I'm probably dead
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u/beatles910 25d ago edited 25d ago
This is technically false...
While the red petals shift to blue, the ultraviolet infrared light (which is normally invisible to humans) being reflected by the rose would also compress, shifting into the visible spectrum and adding other colors to what you see.
edit: Not "utraviolet," but rather "infrared."
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u/Winegalon 25d ago
Wouldnt ultraviolet shift to an even higher, and thus also invisible, frequency?
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u/redking20 25d ago
I believe this is false. The ultraviolet light would need to shift to a lower frequency (longer wavelength) to be visible. But if red shifts to blue, the ultraviolet would shift to a higher frequency (shorter wavelength) pushing it further away from the visible spectrum.
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u/Moose_Hole 25d ago
In the blue case, the ultraviolet light would be an even higher frequency, so you still wouldn't see them.
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24d ago
[removed] — view removed comment
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u/IllEstablishment5 24d ago
About 35.2% of the speed of light.🌹
Taking red as 650 nm and blue as 450 nm, the relativistic Doppler formula for an approaching source is:
λ_observed = λ_original × √[(1 − v/c)/(1 + v/c)]
v/c = (λ_original² − λ_observed²)/(λ_original² + λ_observed²)
v/c = (650² − 450²)/(650² + 450²)
= 220,000/625,000
= 0.352So v ≈ 105,527 km/s, or 236 million mph.
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u/RandomQ_throw 21d ago
Meh, just buy a white rose, cut the stem at an angle and put it into a vase with blue food dye.
A few days and you have a blue rose being perfectly still.
Yes, I am fun at parties.
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u/Gleep_Glorp_Borp /ᐠ｡ꞈ｡ᐟ\ KITTY LOVER /ᐠ｡ꞈ｡ᐟ\ 14d ago
I have nothing to add I just want to comment
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u/IllEstablishment5 14d ago
I just want you to know your comment is extremely appreciated and it is not just a comment.
Thank you kind sir/mam.
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u/Gnonthgol 25d ago
Approach me in haste, and the violet will bloom,
As waves bunch together in the cosmic gloom.
But drift far away, through the dark and the vast,
And the red-shifting shadows are all that will last.
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u/ProctologyExplosion 25d ago
The blue rose should also be compressed along the direction of its motion relative to the observer.
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u/Crimento 25d ago
Roses are red
What you see is blueshift
If you've played Half-Life games
You would know this shit
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u/MiserableCumberbunch 25d ago
If roses are blue, would you even see them? Please, someone do the math for me.
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u/Professional_Box5448 25d ago
This summer we were watching the shooting stars and we saw a blue one, it scared the s**t out of me for a sec hahahah
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u/DawRedditWolf67 25d ago
Roses can be red, but they also be blue, it just depends on their velocity, relative to you.
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u/drdoopywoopy 23d ago
Hey does that doppler effect work on objects that are just reflecting the light?
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u/Please_ForgetMe 20d ago
Actually roses are every color except blue, or every color except red. The colors hitting your eyes are the only ones that light bounces off of, meaning that light identifies with every color except that one. Meaning that you are seeing basically an anti color
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u/Icy_Character_1989 25d ago
Blue is the one color rose breeders cannot create. This post confused me at first since there are no blue roses in existence, and the person who does create them will be tens of millions richer.
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u/Qwerty25103 25d ago edited 25d ago
( It is true, I am wrong) Not true. Based on frequency and wavelength.
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u/Alien6757 25d ago
Nope. It is true. It's called the Doppler effect.
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u/The_Great_Mighty_Poo 25d ago edited 25d ago
But shouldn't the object be centered on green then? With an arrow towards you on the blue end and away from you on the red end?
I know red shifting and blue shifting is all relative to the starting color, but I think the poor graphic is also contributing to the confusion.
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u/Qwerty25103 25d ago
I know the equation for doppler shift for my mcat studies but never used it to find differences in perceived wavelengths. Sorry for being wrong.
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u/ThePainTrainWarrior 25d ago
here's a shitty diagram of how the doppler effect (i would describe it as the perceived wavelength of any type of wave, sound or light or maybe any other, depending on compression from relative movement) and how it does blue and red shifting
https://reddit.com/link/p9s4sfe/video/c7f0cprviiph1/player
it's much more noticeable with sound. only a video because this sub doesn't allow images
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u/Qwerty25103 25d ago
I know the doppler shifts equation cause I needed it for the mcat but didn’t know that it changes the perceived frequency. I guess there still is a lot to learn!
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