Blowing on them bends the bubbles, refracting the light relative to the eye of the observer. Coffee grounds often have these rainbow bubbles doesn’t have to be soap.
Exactly. Upvote cause this is part of it too. I am a long time coffee drinker and noticed it once started buying the best beans from a local roaster (organic, fair trade, properly roasted etc).
Oils. I worked as a waiter for 5 years and those bubbles are always soap or petroleum like.
Caffeine is hell of a drug. Corporations implemented coffee breaks. They noticed those who drink coffee in the middle of the day would work better, produce more stuff, easily cover the coffee's expenses.
50 years in. Now coffee breaks are in every field of production material and immaterial. Production is to the Moon yet we have to work like our grandparents for less pay. Life of a peasant sucks in any age.
pretty safe, they stock them on the space station and you'll see doctors and other long shift workers besides military using it. there isn't really a high you just feel regular awake, caffeine is a stronger stimulant.
In UK we've always had tea breaks. Unions had to fight to get authorised breaks for the workers as well as fair pay and health and safety laws. Factory unions have had most of their powers taken away thats why they now have to work for peanuts.
I think I actually know this one. I've seen a video about this in the past.
Since the bubble is curved it is constantly filtering what is the wavelength it diffracts, so it may have many colors. There is also a constructive and destructive interpherence here.
Blowing will change the curvature and thin the film of liquid at the top of the bubble compared to the bottom.
This would explain why it appears after blowing. But why are they appearing.... maybe it happens a lot and we don't notice or maybe you have some soap there
It's not due to the curvature, but due to the thickness of the bubble. When transitioning from air to water on the outside of the bubble, some of the light is reflected. This happens again when transitioning from water to air inside of the bubble. Depending on the thickness of the bubble, different wavelengths of light will destructively interfere with themselves, reducing or outright filtering themselves.
This process is very sensitive to the exact thickness of the bubble, so small variations in thickness along the surface causes different colors to get filtered.
Yes. And I expect the blowing might make it thinner.
But the curvature might also make some difference in this case because we don't see lights, then we see them. Being less curved might influence the angles that point to the camera.
I have this issue with dishwashing pods. That leaves enough of a residue to where you can't physically see it and the cup looks empty. But as you can see the residual from the soap is rehydrated
This phenomenon is known as thin film interference. It has to do with different indices of refraction of the liquid and air inside the bubble. It doesn’t necessarily mean there is soap in your coffee.
Superman is invulnerable and shoots lasers from his eyes.
Professor Xavier is the most powerful telepath on Earth, he can read minds and manipulate the consciousness of others.
Dude — makes bubbles in his mug multicolored. You're sweetheart Disney princess. =)
Also known as the "Bad Breath Bean"
Is a specific type of coffee bean that when grounded and exhaled upon can react in color depending on the odor in one's breath.
Another important note is that i made this up completely
People keep talking about curvature here but I think it's actually about the thickness of a bubble when it becomes the same order of magnitude as the wavelength of light then you get these cool, constructive and destructive interference interactions. Potentially before you blew on it, the bubbles were too thick to have that interaction, which is why when you blow on it, it thins out and happens
The colors are created by thin film interference. The color produced depends on the thickness of the bubble walls. Maybe somehow blowing in the coffee changes this thickness (maybe blowing makes them thinner and then cohesive forces draw up liquid again and thicken them)?
Changing the refractive index can also do it, like if blowing pushes away oil and leaves water behind, or vice versa.
The effect of thin film interference is to "cancel" a narrow band of light. This tends to produce the colors cyan (red removed), yellow (blue removed), and magenta (green removed).
Soap residue? Oils from the coffee?
Blowing on them bends the bubbles, refracting the light relative to the eye of the observer. Coffee grounds often have these rainbow bubbles doesn’t have to be soap.
Also, If the bubble turns black just before popping, it means the film is so thin it no longer reflects visible light.
The bending itself isn't the reason, but thinning out the bubble so far that the thin film begins to refract light.
That way you get anodizes tools and carabines for hiking too.
Yes, but because of the oils as a film…good coffee is well oiled when brewed (properly)
Exactly. Upvote cause this is part of it too. I am a long time coffee drinker and noticed it once started buying the best beans from a local roaster (organic, fair trade, properly roasted etc).
Having made coffee for about 10+ years i can honestly say I've never seen this, ever. Is this a rare event?
Looks like soap residue or an organic film from a previous drink to me.
I see it all the time when I use a French press. You get more oil from the beans in the coffee that way.
Oils. I worked as a waiter for 5 years and those bubbles are always soap or petroleum like.
Caffeine is hell of a drug. Corporations implemented coffee breaks. They noticed those who drink coffee in the middle of the day would work better, produce more stuff, easily cover the coffee's expenses.
50 years in. Now coffee breaks are in every field of production material and immaterial. Production is to the Moon yet we have to work like our grandparents for less pay. Life of a peasant sucks in any age.
Long flight air force fighters used to get amphetamines until apparently caffeine proved to be good enough.
B 2 guys are still full of amphetamines when flying 48 hours straight.
modafinil and it's analogs are popular too, no jitters and less amped up feeling.
Idk what effects these have nowadays, are they "safe" when the intake "can" be controlled?
pretty safe, they stock them on the space station and you'll see doctors and other long shift workers besides military using it. there isn't really a high you just feel regular awake, caffeine is a stronger stimulant.
They're all still on it bruh.
In UK we've always had tea breaks. Unions had to fight to get authorised breaks for the workers as well as fair pay and health and safety laws. Factory unions have had most of their powers taken away thats why they now have to work for peanuts.
It’s a physics phenomenon called thin film interference. And is the same reason soap bubbles have a rainbow color! “The same but different.”
Oils from coffee = the iridescence of the bubbles. Blowing on the bubbles redistributes the oils.
Oil? This coffee needs some good old fashioned American freedom
Definitely the oils from the beans.
Motor oil
My fav 🤤🤤🤤
chemicals from aliens
Nah, they got rainbow breath
The oils actually hold a lot of caffeine, and flavor. It's why I don't use paper filters, because those absorb all the oil.
Congratulations, your latent mutant powers have activated! Wolverine will be crashing through your living room wall shortly.
OHHHH YEAHHH BUB
Make sure you enjoy that beer....
I think I actually know this one. I've seen a video about this in the past.
Since the bubble is curved it is constantly filtering what is the wavelength it diffracts, so it may have many colors. There is also a constructive and destructive interpherence here.
Blowing will change the curvature and thin the film of liquid at the top of the bubble compared to the bottom.
This would explain why it appears after blowing. But why are they appearing.... maybe it happens a lot and we don't notice or maybe you have some soap there
It's not due to the curvature, but due to the thickness of the bubble. When transitioning from air to water on the outside of the bubble, some of the light is reflected. This happens again when transitioning from water to air inside of the bubble. Depending on the thickness of the bubble, different wavelengths of light will destructively interfere with themselves, reducing or outright filtering themselves.
This process is very sensitive to the exact thickness of the bubble, so small variations in thickness along the surface causes different colors to get filtered.
Yes. And I expect the blowing might make it thinner.
But the curvature might also make some difference in this case because we don't see lights, then we see them. Being less curved might influence the angles that point to the camera.
My understanding (primitive as it is) is that surface tension between the inner and outer layer of the bubble creates refraction.
Blowing on them is bending those surfaces and changing the refractive index, producing the color change.
May I offer you a breath mint?
Dam that's pretty af
Magic guys!
magnets.
How do they work?
Nobody knows
The coffee is black so….
I have this issue with dishwashing pods. That leaves enough of a residue to where you can't physically see it and the cup looks empty. But as you can see the residual from the soap is rehydrated
Got that coffee that REALLY makes ya run to the toilet lol
This phenomenon is known as thin film interference. It has to do with different indices of refraction of the liquid and air inside the bubble. It doesn’t necessarily mean there is soap in your coffee.
https://en.wikipedia.org/wiki/Thin-film_interference
Soap residue
Are you gay by chance? This could explain it
Rainblowing
Great, now enjoy Ur soapy coffee :D
You're gay. I support the LGBT community!
Everyone gets a superpower
This is yours
Superman is invulnerable and shoots lasers from his eyes.
Professor Xavier is the most powerful telepath on Earth, he can read minds and manipulate the consciousness of others.
Dude — makes bubbles in his mug multicolored. You're sweetheart Disney princess. =)
Woke coffee?
Rainblow
Gaaaaaayyy
Bro is render enhancer in his breath
Very psychedelic lol
I notice the same thing on my coffee 🙂 and it's not soap residue, used only plain hot water on mug
Yep, bubbles are neat
Witchcraft.
So it’s you who controls the bifrost?!
Light refraction. Nice.
thin-film interference?
this is how happiness looks like for coffee lovers))) i get so much pleasure from this video
Newton rolling in his grave
Did you put dishwashing liquid in your coffee?
must be uk
For sure oils from the coffee beans refracting light. Looks cool!
This is how you know it isn't decaf.
You must be a unicorn!
Soap.
If you blow really hard they will turn you into a rainbow
kinda drives me crazy every morning when i see it, but then it's natural.. thank god
You’ve got detergent residue in your coffee pot, not magic at all
brush your teeth
1.8k updoots on a post that has absolutely nothing to do with the sub
I feel like a chemical engineer after reading this post
Caferius Phonum
Also known as the "Bad Breath Bean" Is a specific type of coffee bean that when grounded and exhaled upon can react in color depending on the odor in one's breath. Another important note is that i made this up completely
When I was a kid I used to blow bubbles...
I miss that clown.
When you blow, just say “no homo” and the rainbow bubbles should be gone
Just oil from the beans. when I make a strong cup of French you a see it in the surface at an angle.
Coffee has natural oils, oils get shiny-like sometimes. Bubbles made with oil-stained water gonna get shiny-like, too.
People keep talking about curvature here but I think it's actually about the thickness of a bubble when it becomes the same order of magnitude as the wavelength of light then you get these cool, constructive and destructive interference interactions. Potentially before you blew on it, the bubbles were too thick to have that interaction, which is why when you blow on it, it thins out and happens
r/stevemould
You're a fairy
The colors are created by thin film interference. The color produced depends on the thickness of the bubble walls. Maybe somehow blowing in the coffee changes this thickness (maybe blowing makes them thinner and then cohesive forces draw up liquid again and thicken them)?
Changing the refractive index can also do it, like if blowing pushes away oil and leaves water behind, or vice versa.
The effect of thin film interference is to "cancel" a narrow band of light. This tends to produce the colors cyan (red removed), yellow (blue removed), and magenta (green removed).
That's not magic, that's oil.
Who needs creme when you can have detergent am I right? 🫧
Coffe has oil in it, oil creates a rainbow effect when suspended on top of water…not too difficult to figure out.
Ahhh Americans…
Esa mierda toda mal lavada jajaja y se asombra el cochino
Rinse ya fkn dishes better lol
Dude, you’ve got way too much time on your hands…
Don’t drink it, it could be soap or some coating from your pot malfunctioning
We hate to tell you that you’re not special, so we won’t.