Veritasium - 2017-06-15
This is what the world would look like if you could see invisible air currents, temperature gradients, and differences in pressure or composition of the air. Support Veritasium on Patreon: http://ve42.co/patreon Special thanks to Patreon Supporters: Tony Fadell, Donal Botkin, Jeff Straathof, Zach Mueller, Ron Neal, Nathan Hansen I first saw a Schlieren imaging setup around ten years ago in Melbourne. I was immediately fascinated by the way I could see the warm air coming off my hand. I hadn't expected the currents to be moving that fast or to be so visible. This was a tricky setup to get right because alignment is very important and here I'm just working with what I had lying around the house mostly (plus the mirror). For the best Schlieren photography, making sure the mirror is stable is essential. I want to improve my setup so the mirror doesn't wobble back and forth too much creating the pulsing light and dark sections of this video. The relationship between index of refraction of air and temperature, pressure, humidity and wavelength is complicated. This website will calculate it for you: http://emtoolbox.nist.gov/Wavelength/Ciddor.asp Slow motion by Hollywood Special Ops: http://www.hollywoodspecialops.com Sound Effects by A Shell in the Pit: http://www.ashellinthepit.com Filmed by Raquel Nuno Special thanks to Blake Nichols for assistance
a speaker doing a sound sweep from 1 to 20000hz
A human fart would be interesting.
Lol or being in a room full of farts, all breathing at once as the fresh air is all contaminated.
No wonder I love being in nature so much. It’s pure fresh air that keeps me so healthy 🙀
Great Presentation... what we don’t see, We don’t know!
That was the "Helium Balloon"
I thought about that.. scrolled down to the comments and you beat me to it.
it would look like a breath
Glad you specified human
Destin sent me here. Whips and all that Jazz. Great explanation of this camera setup.
Thanks for the video. This is such a nice setup :) I suggest you try some of the following:
- open a carbonated drink (remove cap of a beer)
- surface of a carbonated drink sparkling
- start a firecracker / roman light
- laser heating up the air
- shoot a gun / airgun
- audio speakers
- use multiple speakers to create standing waves in the air
- piezzo crystal making sound (maybe surface view?)
- create an electric arc (plasma)
- laminar vs turbulent flow
- spinning ball
- arrow flying
Good luck and have some fun!
RIPxBlackHawk he gave ideas, not tell him to do.
RIPxBlackHawk he asked for some ideas... maybe you are the dumb one.
As an ex-aerodynamicist, you bring back many happy memories of using Schlieren systems to investigate transonic flows over a whole bunch of different shapes. You might like to try to produce "colour Schlieren", where you replace the razor blade with a discrete colour filter - we used to use different coloured bits of transparent gel used in theatre lighting. The only problem is to get the filter small enough to produce the desired colour changes. But it's great fun trying! Good luck.
That's a great idea! Just googled some images and they are spectacular. I'll give it a shot.
What would happen if you used a prism in place of, or in conjunction with the razor? would it be possible to observe a colour gradient?
Also, could you put a fish tank in front of it and watch some fish swim around (might move your focal point as it refracts through the water.
@Veritasium could you tell me where to get one of those curved mirrors so I can try it, too? Thanks! Great stuff.
@live oak Try Edmund Optics or ThorLabs, both are great options
@Javier Martínez Martínez hey, thanks!
Ein Hoch auf die Wissenschaft!
Hydrogen burning in a test tube
How about corona discharge from a piece of metal at very voltage? (like a Van de Graaf generator) Or ionization of the air due to dielectric breakdown?
in an early episode you had a compression heating syringe, i bet that would look cool seeing the change in pressure as you hit it
-Put a drop of cold water on a very hot plate, such that the water does not toch the plate bc of vapor, must be from the side.
-Hot cop of coffe (water), compare to a cup made of isolating material.
-A bee or a fly. If nothing happens add some warm air for contrast.
-champaign
-do you have a tesla coil? or some high voltage generator? electrolize air / lightning => create ozon
kampkrieger I agree that would be cool, the lidenfrost effect is very fun to look at , it would also be cool to see its opposite and use liquid nitrogen on a normal plate to observe it in comparison
4:40 Mr. Stark, I don’t feel so good.
lighting a candle after it was extinguished but lighting it through the trail of smoke.
A whip making a sonic boom
Very cool video. My only nit would be when he talks about his parabolic mirror being a subset of a larger sphere. Parabolas are not subsets of circles. A circle (or sphere) is the set of points equidistant from a single point. A parabola (or paraboloid) is the set of points that are individually equidistant from a single point and a line (or plane). These are different things entirely. He should not be equivalencing the two.
If you have a parabola with low enough eccentricity and take the parabola over a small domain than the curvature of the parabola over that domain is near constant and can therefore be seen as part of a sphere. That is to say it is close enough
- Try and fly/hover a small drone or toy helicopter in front of the mirror, so you can see the direction of the air currents as it flys in different directions.
- Put a speaker under the mirror and play music/different frequencies. Would be an interesting visualisation to sound similar to the 2D rubens' tube video you uploaded in 2014.
- Try shooting smoke rings in front of the mirror, but without smoke so it is invisible to the naked eye.
- I know it is a bit silly, but a fart would be interesting too. For science! lol
- Try setting off an explosion in front of the mirror to see the shock wave. Maybe a small firecracker.
Edit - didn't see someone already mentioned the speaker. Would still be a cool experiment in my opinion though :)
1:35
Wouldn't "parabolic" imply it's NOT spherical/a cross-section of a sphere?
Obviously, but taking such small portion, the paraboloid seems a good enough approximation for the sphere.
@zeycus Just seems odd to stress how precise everything has to be for this to work and then mess up that detail - especially for a Veritasium video.
The instant the lighter was lit up looked like a tiny nuclear explosion :D
Do a rocket engine starting please
Perhaps a bass guitar string would move at a frequency that could be picked up.
A standing wave created by speakers!
You can have whatever wavelength you like as long as it fits in the space a whole number of times. And that space need only be the space between two speakers.
ManWithBeard1990 I think it's actually as long as a whole number of half the wavelength can fit in the space.
you're right actually
No, not nearly cool enough. By Opera singers. Now that would be awesome
A ping pong ball floating on a hair dryer
Does anyone know where I can find a large concave mirror like the one in the video?? It will be helpful thxs !
Do different wavelength of lasers have different levels of diffraction? If so is it at all possible to record multiple wavelengths? Would it look Technicolor?
shlogan123 diffraction, not reflection. this is why refractor telescopes get zones with more red and blue but reflectors won't
How about objects over time? Something like:
• Ice melting
• Apple sitting still for several days (aging and drying out)
heat up a popcorn kernel until it pops.
Yes please.
Kernel Sanders?
Don Schumacher, Jr. great idea
Hi.. can you please guide me towards building my own setup. I mean with the specifics of a Mirror and other. Requisites. It is for my research purposes. Thermal cAm is not quite cheap. So, Schlieren just might help me. Will be waiting for your Reply. Thanks.
Bdw.. Subscribed a d updates .
Awesome work. 👍
This is just mesmerizing! such a "simple" setup for truly amazing shots! love it...
1:35
that's a mouthful, can I call it a tiger
Do I have to darken my surroundings for the experiment?
and, Did you use a high speed camera ? how did you get a slow motion?
Besides all other things brilliantly executed, I just want to praise the editing of the video. No music, allowing the scenes to breathe. I enjoyed the slower flow and I could in peace stare at the captured light in wonder.
He added thunderstorm sound effects to his blowing out the match, though.
...No he didn't...
4:12 it's like he detonated a nuke😂
I would love to see a Stirling Engine running.
A desktop model low-temp differential engine that is clear would be ideal.
The sound of this video is equally sexy to the imagery :o <3
I'd like to see the difference in heat coming of the top of your head before and after eating spicy buffalo wings.
🍗
In a world of political discourse and divide, coming to watch a video where I could learn something and see something I've never seen before is a refreshing change from the norm. I thank you for that.
Literally Shitler Politic is all a show! I'm so bored of it! Do something helpful for the people short term and long term and help people live a good life!! Stop the lies and manipulation 😑😑✋🏻✋🏻🙈🙈
Well said.
Less Post-Truth and Trump videos, more of this.
Oh the first real one, do you hear Derek? Mmmm? (snicker)
Sup3rman1c+ Are you saying I have video's that directly take opinions on political matters? I don't have any uploaded videos, so what are you talking about?
"Schlieren" is correctly pronounced with a really long "e" as in "wheep" :)
some air gun shots could be nice, pressure instead of heat to change the RI of the air
Awesome videos.
Could you add some technical details about the light source and the mirror used in your Schlieren setup?
I know what I want to see: The Leidenfrost Effect. It would be amazing to see that water vapor keeping the water bubble afloat and moving.
This is pure art man, science creating beauty, love it!
This is easily the best video I've seen on youtube!! amazing!
I see this all the time when I heat up my rig to do a dab. Cool then n cool now
this is amazing! incredible setup. can we see the heat come out of a pork bun as you open it? or pouring hot tea into a cup?
I'd love to see a Sterling engine in that setup!
The rear side of a fan, showing the air being moved from the back, into the blades, and out to the frony please?
PattPlays no a side view!
Alpha Designs why not both!
4:57 dont look at the mirror here you get sick
appreciate all the effort :)
Thanks for the video! Starting a research assistant position for a project that heavily involves schlieren and shadowgraph imaging for aerodynamic purposes, and this is really helping both spice up the preliminary studying and reading
This is amazing and sooo practical!! Thank you for your videos!!
It would be cool to create some kind of vortex like a mini tornado!
vortex cannon and fire vortex. like colin furze did as subscriber special but smaller (obviously)
Turun Ambartanen or like a vape tricker
or a guitar string being played
and any shockwave would be cool i think someone said a firecracker, so like small fireworks would be sweet
+SteveMould Fire Tornado would be cool for this.
Pedro Semeano - 2017-06-15
A whip breaking the sound barrier.
Andrei Sirbu - 2019-06-01
@SmarterEveryDay brought me here
Joseph Padla - 2019-06-01
Everyday smarter
Graxymo - 2019-06-30
https://www.youtube.com/watch?v=AnaASTBn_K4
Joseph Havens - 2019-12-24
I think smarter every day did a video on that. they found something very interesting regarding when the whip breaks the sound barrier.
szekowski - 2020-01-05
Charles Mullins smartereveryday