How Much Vacuum Is In a Fluorescent Bulb?
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- Опубликовано: 1 окт 2024
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In this video I show you how much vacuum there is in a fluorescent tube light bulb. I talk about how they work and why they need a low vacuum.
Photonicinduction video: • Fluorescent Tube Sucks...
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Photonicinduction is a legend
Yes
THE legend
Always cool to see a high-sub channel has interest in a grey-area channel I've watched for years. It's like finding out your professor is a stoner.
@@brownell10 let's see how many new subs this video will bring to his channel
So glad he’s back too
"You'll notice how the plasma globe no longer works after I broke it". I love this guy.
yeah xd
😪 he is just broke that
😛But for atleast some good purpose
@@vaisakh_km good english and great use of emojis...😴🤪💧🐸🐸
@@PPpeepi 😬
As he was describing that it wouldn't work because there was too much pressure, I thought, "OMG, he's gonna put it in the vacuum chamber!" and he did.
For some reason the random stick, dye mixing moment was so wholesome
Such a scientific channel lol
Weird.
i thought it looked stupid
A fluorescent bulb has as much vacuum as does a chip bag have air
Nice of you to give the channel Photonicinduction a shoutout because you got the idea to do it as well because of his video. Nice video! 💯
So good you mentioned Photonicinduction at the beginning. I saw it a time ago on his channel. Great you mentioned you source, I really appreciate that. As always your video is great and at least it achieves a wide range due to your channel!
Remember that there will still be a partial vacuum even after filling the tube with water due to the mass of the water in the tube above the level of the water in the reservoir. This will be more pronounced in the longer tube. You'd have to equalise the levels in the tube and reservoir to get a true indication.
I love the chosen to
True. It acts somewhat like a mercury pressure gauge.
Tube should be placed close to horizontal position
Atmospheric pressure in feet of water is 33.9ft. He would need to Brody it and get a bigger tube.
And there was likely air trapped in the upside down endcap void
Photonicinduction is an absolute legend. Truly the best of British. 👍👍
Dude, James, that was just rad. I love that you SHOW us scientific ideas, that’s what RUclips was practically made for!
RUclips was made for showing ads over content that platform received for free.
@@Cypeq it wasnt MADE for that. youtube originated as a simple platform for creators to post videos and interact with others. now its become the gross ad complex
@@spitgorge2021 Exactly. Now you have "creators" only here because of ads. Not all of course, but many suddenly appeared when Google decided to make youtube into advertisetube. Now you have to pay for no ads. Disgusting how something that was free (not paying to see ads) Now became paying for the same thing that was free.
@@ganjasage420 It does have, though, the benefit of some people being able to be full-time RUclipsrs. But yeah, it really sucked to go from having something nice for free, then having to deal with the ads..
I would be so happy to hang out with this guy for a week.
Even an hour lol
stevo???
I'd even like meeting him just for 5 seconds🥲🥲
Defo but i dont think a week would be enough for me
Kinky
Actually the water should have filled even more. The weight of the water column itself is pulling it down somewhat and thus we see the gap above it much more than it should have been
Yes , Exactly
Atmospheric pressure is about 33.9ft of water, so he would need a tube at least that long for the weight of the water column to not be able to reach the end. He explained his losses properly as water vapor from the column of water boiling as it filled.
@@Sembazuru true..both the vapour pressure and weight of water column pulls it down and thus forming the gap at the top. Yes, vapour pressure of water is the major reason, but weight of the water column is not negligible either.
Love this channel.. Photonicinductions channel is also pretty damn epic
It's initially amazing that it's structurally solid despite being thin glass but it is only 1 atmosphere of pressure difference and that is pretty low when it comes to engineering. I'm always a bit confused when people talk about how space engineering solutions have to deal with "extreme" pressure differences when it's a maximum of just one atmosphere whereas submarines are build to withstand 30x that amount.
They get leaks in space all the time, and it’s only somewhat concerning... a leak in the deep sea is deeply concerning 🤔🤔
😊✌🏻
@@johnpenguin9188 Instant waterjet cutter
The bit in the Futurama episode is brilliant when the Planet Express ship is dragged under water; Farnsworth is counting off the big increase in pressure in atmospheres, when he is asked how many atmospheres the ship can withstand he says, ‘since it’s a spaceship, anywhere between zero and one’.
@@markiefella Another favorite Futurama gag was when they were in the moon, and nightfall was coming.
Moon Hick: Y’awll better get to shelter. At night it gets to -140 below zero!
Fry: Is that Fahrenheit or Celsius?
Moon Hick: First one, then the other.
Earliest I have been to any video...
Same
It s not big deal
It s a balloon stretched over a cup
Sorry... jk+glad
For those curious, the liquid gets pushed up the tube because the outside pressure is pushing the liquid up the tube as inside the tube the pressure is lower than outside the tube. Feel free to correct me if I got something wrong
You are correct.
So if you have a long enough tube, eventually the water will stop rising, even if there is still vacuum in the tube above it. There's a limit to how high the atmosphere can push the water up.
@@korntut yes, that's why you couldn't build a huge straw into space to suck the oceans out
@@eddiefenton6309 😂😂😂
The Action Lab in 2030: I've built a vacuum airship!
8:00 Couldnt it be also some gas that was dissolved in the colored water and then got de-gassed by the vacuum? Probably just a tiny amount tho.
Most of the volume that is left is filled with water vapour and dissolved gas from the water. If you used a smaller tube and a liquid that does not boil easily, like mercury, the filled volume would be pretty much all of the tube volume, with only a very tiny part the gas in the tube. The amount of fill gas is very small, a single small sparklet cylinder, like used for soda syphons, whipped cream or paint ball pistols, contains enough gas to fill a thousand of the 8 foot tubes, even though most of the gas would be lost in the filling system tubing, as it is pulled down to a very low pressure before you introduce the tiniest amount, under a tenth of a gram, of the gas fill.
I was thinking the same. But than again he has a vacuum chamber he could easily get rid of that dissolved air. There is even a video he made about it ruclips.net/video/WTVwAZ0_9p0/видео.html&ab_channel=TheActionLab
He really surprises me every time with different titles
Awesome, fixed a thousand of those lights but never completely understood how they work 🤔 thank you for making me smarter
So how much mercury does one of those long tubes contain?
Very little mercury is actually in the tube
Good question, I was thinking you can use PV=nRT to solve for the cylinder of “gas”above the water. When you solve for n, you can find the number of moles of mercury vapor. However that’s not everything, you have to account for the water vapor and dissolved air in the water that made it to the top. You also have to account for the mercury that got dissolved into the water.
Without the water, we know it is 0.3% of the Earth’s atmosphere according to Dr. Orgill. However, there is still some air in there I don’t think all of that is mercury vapor. But using PV=nRT you may be able to solve that.
For those 0.5mg of mercury, but the modern replacements for those Sylvania tubes (not for the 8ft, no longer made) are T8 diameter, and contain between 0.1 and 0.05mg of mercury, depending on the actual manufacturer. In general the mercury dose is inserted using either a tiny shaped pellet of mercury amalgam (typically copper and nickel powder), dropped in before final evacuation, or a small glass ampoule attached to the one electrode shield, which is induction melted after the tube is sealed to release the mercury.
Not that much at all, you might find higher amounts in the air off of coal power plants, and there might be more in eating a largely fish based diet.
Sir ..love the way you explain...Here in India majority of Scientific RUclipsrs waste more time on useless talks and stuff and explain and demonstrate a few...YOU STICK TO TH POINT AND ARE PRECISE IN DEMONSTRATION....
Love your Videos Sir
When I seen the title I wondered did he copy photonicinduxtion then he shouts out the channel that's awsome
If you could lay the tube horizontally it would totally fill up. You have created a water based barometer where the weight of the water is keeping partial vacuum on top of the tube with the drop of water from the top being balanced by the atmospheric pressure being applied the water in your container. Kind of Cool to see. It kind of reminds me of how you are supposed to refill some automotive cooling systems. You use a vacuum pump and pull the system down check for leaks and then open up a line to your antifreeze. This fills up the whole system and ovoids airlocks.
@actionlab I have a theory
That if we can see with the help of photons that means there is something in the photons that stores information (memories)
So, it is also possible that information can be stored in other sub atomic particles as well
And if we get to know how to access this information we can see back in time.
What are your views on this theory or hypothesis??
YALL LIKE THIS SO ACTION KAB CAN SEE THIS YOOOO
Hypothesis is probably wrong. And also i think its not the photon that store information. Its the formation of photons that carries the information.
For example,
If you see through a glass you can clearly grasp what's the other side.
But if you put a blur filter/matte transperant surface. It will be just a gradient of colours. Theres no way you can reverse that. Cause you can't get information out of photons.
Imagination about reversing time / getting information from past is amusing but sadly is impossible for now.
The color is just due to the wavelength which is just a property of it. And there is not any other thing that you might be calling information
7:00 that's below atmospheric pressure (given the force that the water is pulling down with)
Thanks for doing the silly sh*t we never could (or never thought possible). As a kid these light bulbs scared me, it was like black magic.
the plazma globe he uses scared me like it was black magic. i hate plasmaglobes
Photonicinduction did this as well.
you fell to the same problem as you didn't degas the water before hand.
so the amount of vacuum would have been higher if you removed the disoved gasses in the water before hand.
still a cool copy of Photonicinduction's video titled "Interesting Experiments With Fluorescent Tubes" Jul 15, 2021
I just went down a "can fluorescent lights cause skin damage/cancer?" rabbit hole........ 🤔
"How Much Vacuum"
what?! that is not a thing! literally !!!
vacuum is the LACK of anything!
@ 07:50 actually this is not atmospheric pressure, more like 0.24 bar because you have almost 8 ft of water pulling down on that volume of gas.
Ideas for experiments --
1.can you try putting water in a vacuum chamber and then suddenly open it and se what happens when it is in the vacuum chamber and after you open. I think it will be really cool
2.can you try freezing fire that will be super cool
Hii bro can you do a experiment for me take a glass tube and fill it wiith air and plasmafy it and add magnetic plasma compressor and add an current cycle which will compress the plasma at specific distance add 1 more at every test when you circulate current in magnetic plasma compressor switch off the current flowing in tu de to see if plasma remains when only compressed and relesed but without current or voltage apllied to it✌✌✌🤞🤞🤞🤞🤞🙏🙏🙏🙏
Thanks for the great demo of the phosphor powder & the UVC light.
I would like to know where I can buy a small amount of this white phosphor powder please ?
Since this video brought plasma globes and fluorescent tubes together , I wonder if you know and can explain how a plasma globe and fluorescent tube's proximity results magically in a lit tube ?
you may get this a lot but what will happen if you spray your whole bathroom with hydrophobic stuff and shower in it
That moment you copy photonicinduction
The way this experiment has been conducted is really awesome.
I thought that too!!
Can you tell why our hair rises when rubbed with thermoplastic polypropylene.
Can you put ferrofluid in an induction motor and see what it does and how it looks somehow?
If super glue is inside a vaccum chamber how would it look like
Really? You copy Photoninductions vodeo? Wow.
You're legend. If you think UR..
🤫🤫😌
You are forgetting about gasses already dissolved in the the liquid
WILL A GUN FIRE IN A VACUUM?
Anyone watching this video in 2160p 😂😂
Fascinating to see and get a really good lesson in exactly how fluorescent lights work!!
This guy can make science experiments from anything lying in his house.
Is it possible to manipulate the movement of blood ( increase the blood flow) in humans arteries using magnets??
Or, to correct/increase the signal processing in a blocked 'Nerve', the patients with paralysis may be befitted with it.
In Magneto-therapy, the magnets are placed on the wrists/ankles/knees without calculating the size/power/ polarity of the magnets.
I wonder how much of the “air” bubble is water vapor 🤔
0:12 i did same when i was kid but very roughly just blocking tube inside of water bucket to see the vacuum .
Secondary seen on RUclips of That Hight Voltage & current guy as he mentioned photonic ...
Now i like to see it again..
I really enjoy this guy’s videos. Very interesting topics, well done. Thank you.
Nope.... Mine main question was how that mercury turned into vapour form in cold session ... ?
Now i know there is also some other gas are present which first ionized in low temperature and the heat than absorbed by the mercury which turned it into vapor .
Can you please make a video explaining how the water boils when it gets sucked up like how in the world is that possible what makes water boil when it gets to a certain pressure without heat?
It has heat, it's at room temperature. If you google "water phase diagram", you'll see how water behaves at various temperatures and pressures. This is actually a known issue for cooking at altitude.
Pretty sure the answer to the question asked in the video title is: 4.
Finally! I have always wondered 🤔
Nice, I was just watching the always up stairs video.
Photon is a really cool guy glad he's back.
The Mad Lad is back!!
Who is photon?
The name of the channel is photonicinduction
I sometimes wonder if the moon, instead of cheese it's really made of phosphorus!🧐
Oh great. Now I gotta know what a black light would look like on the moon.
Photonicinduction did this weeks ago.
7:03
Will the amount of air in tube, actually at atmospheric pressure now? Or would it be lower due to the water it's holding at that height
Somebody please clarify my concepts...
I think doing the same experiment with the tube inclined as far as possible will yield proper result.
The air would be at atmospheric pressure
@@sunilkumarpandey8336 thanks... But I need to know the reason why to believe it
I didn't expect such a low vacuum, amazing since the glass is actually pretty thin. Though we always forget how strong the cylindrical shape actually is.
Yeah, didn't expect that too.
Maybe you should try it with the tube more on its side. The small vacuum at the top may be caused by the weight of the column of water.
I think better would be to just work out the distance not covered by water due to its weight.
Hmmmm.... mercury vapor inside the tubes. Probably not the best thing that a buddy & I broke 40 of them because his trash people wouldn't take them away because they were too long & stuck out the top of his trash can, huh? =(
Crazy. I guess I have more respect for the round shape….it withstands all the external atmospheric pressure for years and years. I never would have thought that thin glass would be so strong….yet seems so brittle when it does break.
Had no idea the vacuum was that strong. But did you consider deaerating the water before hand? Isn't there some dissolved gas in the water that contributes to that 'boiling'? Thanks for sharing such experiments.
👍👍👍🙂🤝
You explains the science better than my science teacher
Very interesting... I wonder how much air would come out of the tube, if you broke the it under water. So let's say you have a very deep swimming pool and you put your enormous fluorescent tube in it vertically. If you then were to break the top of it, water would rush in to fill the vacuum, but if there were any air inside the tube, it should bubble up towards the surface. If that's the case, you could capture that escaping bubble in an upside down bucket and measure the volume of that air. There shouldn't be much, so perhaps a small syringe would be enough the measure the volume of that bubble. This way you would be able to experimentally determine the mass of air inside the tube, and calculate the pressure it originally had. Also, that would give you enough information to calculate the forces the glass tube has to endure while there's 101 kPa on the outside and whatever low pressure on the inside.
I really wish you would destroy T8 or T5 lamps and not T12 lamps as they are getting a bit harder to find these days and they are a far superior lighting source.
photonicinduction did it two months ago..
I have a question for you
Does RUclips pays off?
Loving ur videos since 2018
Especially the 1 table spoon of a neutron star
Please find out how much vacuum there is in my relationship life :'(
I really wish you had put the plasma coil in the vacuum without the bulb. The results would be much more visually appealing
Now break the top and sniff it.
What if you change the gas inside your vacuum chamber? Like argon or xenon...
I was waiting to know how much volume of water it absorbed
Me too. 3 beers?
"most of it is just empty space", "fluorescent bulbs are filled with mercury vapor". well which one is it?
I would like to see the same thing done with a CRT... although i guess it would be difficult to see through.
You should upload in HDR for light related videos. Would like to really feel the bright of the phosphorus!
Oops... I’ve been breaking every burned out fluorescent bulb in the dumpster for years... It’s surprisingly fun. But I always think “Don’t breathe this”
So how much vacuum was inside?
Liked even before the video starts while watching the ads
As i know it will be amazing as always 😁
I'm maintenance, I've found just one bulb full of water. Still in the walkin door. How with it still not shorting out my whole wall of 🚪 's . Allsups in Memphis Tx. Changed that bulb, they all came back on!
I'm at a lose. 4 ft bulb is heavy when full of 💦
I knew fluorescent tubes were low pressure, but this demonstrated the vacuum really well.
When you break a tube, you don’t really notice the vacuum, just a popping noise then glass everywhere.
When I was an apprentice, before ‘green house gasses’ were a thing. I would break fluorescent tubes by ‘posting’ them into a skip through a pipe in the end of the skip, specifically designed to smash tubes. 😀
My fun was ruined when the skip was full of cardboard as the tubes didn’t smash as I posted them in, they smashed when the compactor ran, the noise was hidden by the compactor’s hydraulic pump ☹️
I have a question! But I don't know where to ask it, so I'll just do it here: If liquid water could become as hot as deep-frying oils, would you be able to deep-fry stuff in water? Would fries become crispy etc.?
Eka
ruclips.net/video/fL0NySP4amo/видео.html.
@@marious9986 it's been 59 second and you started selfpromoting.
B R U H
There's zero "air" inside a florescent tube. Air is nitrogen/oxygen/CO2. etc. Florescent tubes use mercury/argon.
I got a question about vacuum bleeding. I had a radiator making noise in my apartment and tried to bleed it. I kept being unsuccessful and started trying to figure out why it is. I found out the bleed nipple was not at the highest point of the system, the radiator was slanted the wrong way. When I contacted the technical support they tried themselves first but ended up having to increase the pressure in the water circulation to finally succeed.
I've since had the pressure down so low that opening the bleed nipple sucked air into the system instead, but in the case I'm describing the bleeding still worked to the extent that it alleviated the problem but did not solve it completely.
My question is how does it work and to what extent? Can I put the bleed nipple right to the bottom of the radiator if I pull a vacuum in my apartment?
If you think of a bicycle brake system with DOT fluid (SRAM or Hope for example) the bleed process includes pulling a vacuum from both ends. But if there is a syringle that is trying to pull a vacuum in a system, can the syringle pull air into itself from higher up than the top level of its own volume? Why does it need to be done from both ends and not just the top?
Thanks
Let me just add that mercury vapor in a fluorescent tube doesn't just produce ultraviolet light, it does emit a fair amount of visible light (yellow, green, blue, violet spectral lines) too. The visible light comes through the glass coating and the glass. The UV light makes the phosphor glow mainly in red-orange-yellow region (depending on composition), thus some of the energy of the UV light is converted into visible light. This is the "fluorescent" bit in the name. Some energy is lost as heat in the process, so a fluorescent tube is warm to the touch when in operation.
If turn the tube horizontally, the vacuum space will decrease (with some 20% for about 2m?!) This could be a more realistic size of gas volume inside the tube.
You should try to put at least spanish subtitles, you should win a lot of more subscribers, your videos are so much more interestings than other science channels.
Ya florescent light ballast output is 550v to 600v even higher open circuit voltage. They limit current once the arc is struck. Definitely not 120v like you said.
I was worried at first that you wouldn't fill the 8 footer because your setup is similar to a barometer. Then I looked up atmospheric pressure in inches of water and converted to feet. You'd need a fluorescent tube longer than 33.9 feet to actually make a water barometer (and somehow keep the top of the water column from boiling...).
I have a question. If we stay 20 years on earth (365 days) and went to another planet (180 days) and stay there for another 20 years, If we go back to earth, how old are we? Is it 40 or 60?
Water is kind of heavy... Since you're keeping the water reservoir below the tube, you'll be pulling a bit of low pressure in the broken tube just by virtue of water weight pulling against the external air pressure, won't you? Adding that to all the water vapour implies that this will be a pretty inaccurate test.
How much of an impact do you think the weight of all that water sucking on that little bubble would have? What percentage difference in the volume of gas would you expect to see if the tube was horizontal, such that the bubble would be at 1 atm? 10%? 1%? Less? Would the water still have boiled?
Well that was pretty damn cool...I was expecting the 8ftr to shatter when you popped the end....but it didn't....🤯
By definition a vacuum is nothing. How can you measure an amount of nothing?
Divide by zero? Multiply by infinity?
Question: my florescent tube crackled and smoked before I turned the switch off. Did it leak mercury or phosphor? I opened a window and turned on a box fan, but is my basement dangerous to go into now?
The water should have gone approximately 10 m since 1 atm for ~1000kg/m^3 only if had an opening on top of the tube 🙄
Photonicinduction hasn't posted for a month, I hope he didn't break his neck on the treadmill 😨