The history of the barometer (and how it works) - Asaf Bar-Yosef

View full lesson: ed.ted.com/lessons/the-history...
A barometer is an instrument that measures air pressure, allowing weather forecasters and scientists to better predict extreme weather events. Despite its incredible usefulness, inventing the barometer was no walk in the park. Asaf Bar-Yosef describes the series of scientists and events that contributed to the birth of the barometer -- and explains how it actually works.
Lesson by Asaf Bar-Yosef, animation by Reflective Films.

[@Tombee2]

2:41 instead of a light bulb there is a candle which is historically accurate.

[@FluodioCin]

=)))))

[@booklover-hu9tw]

😂😂😂

[@Fulikia]

damn didnt realized that

[@shashikalaraju5769]

bulls eye.

[@aninditamukherjee8149]

True!

[@GuillotinedChemistry]

This is definitely one the best video I've found on barometers. Really nice job on explaining misconceptions about vacuums.

[@huzaifaarshadabbasi8744]

👍🏻

[@Sevalithi]

Oh these little scientist dudes are so cute!

[@satire9298]

No homo?

[@Sevalithi]

He feels like he needs a disclaimer whenever he compliments guys. Probably because he's not secure in his own sexuality.

[@marafradella2712]

Thank you!

[@intelX1000]

Kyle Sanchez
This is what's called 'projecting'.
You always check if your projection is correct before stating it, or you'll look like Kyle, the liberal.

[@timlang3852]

Kyle Sanchez o

[@amyannaroy8357]

good job with the graphics and explanation....

[@cbomb002]

So weird, I actually have 2 notifications right now.

[@farzanaqalandari5615]

Pop

[@kilney2418]

Evangelista torricelli

[@smitasuhas7981]

I have experimented this with mug in bath tub (Some Indians can relate)

[@a.kzestos2085]

True

[@yashrathi6862]

the height of the water level at ground level is close to 9 meters, you can't do it with a mug unless you do it on high terrain.

[@shaunakn5881]

True lol

[@askhfbfns67589]

not Indian but i can relaten lol

[@RandomDudes710]

I think that's what we call a faulty barometer or just not a barometer at all

[@kirstenkoch5920]

By far the best and simplest explanation I've seen. Good job with the graphics too!

[@raniahussein7002]

I am from iraq,,,,I like this way to understand information in study,,,,,,great video

[@atiqueahmad3058]

Rania Hussein o

[@moej3386]

@@PhartingFeeting exactly-

[@xOxAdnanxOx]

Moe J what made you’ll go uncomfortable with it? lol

[@KaramYagan]

@@xOxAdnanxOx Chill. They are just pointing out that it is incorrect to use them this way. She should have put dots instead of commas, but.... Mehhh

[@twitwilight6087]

Hi Rania I'm pretty sure that you were in your first year in high school and having a trouble with studying physics and barometer when you wrote this comment, the same thing is happening 😂😂💔

[@MelihCANBOLAT]

3:23 The height should be measured from the surface of the liquid

[@Simon-mr6zy]

yes!

[@harsh2032]

good eyes sire!

[@terenceting26]

I had that question, thanks for confirming. Ted-ed should at least pin this comment. The graphical designers might not understand this.

[@eljison]

Not necessarily. You just need to measure the change in height from any known reference point. If you start with liquid (water or mercury) in the tube, you can make that the zero and calibrate it whatever pressure you want (1 atm, for example), then measure the height relative to that reference point.

[@hassaan1670]

thanks, i was wondering

[@ChanchalKotal]

This is my favorite channel so far because of the explanation and animation of each video. They are too good! Thank you Ted-Ed!

[@MalaysianTropikfusion]

I have to say, the characters in this animation are the cutest I've seen so far. Love it!

[@arushi4335]

😊😊

[@meghanakankara2883]

Thanks for this video. I have been suffering to understand this concept but none was working but now this video with the explanation of the barometer and its history with splendid animation have helped not only me but many other students to understand the complexity and art of learning science. Thank you!

[@AliAli-qc8zj]

Excellent information on how to estimate the atmospheric pressure.

[@therockinggirls4937]

Totally helpful! I was confused abt the barometer but saw this video and understood everything.. Thank you

[@maulikshah28]

Great video, helped me understand the topic really well

[@n8mail76]

thanks. must of us have only memorized these concepts taught to us. learning the mechanics behind how and why the concepts were developed bring a deeper understanding of the concepts.

[@abdulmalikalghazali8241]

I like the way how you make it easy to understand by making it enjoyable

[@jeremiahyolok6663]

very good and clearly explained

[@kokioto420]

I'm so thankful Ted Ed had a video on this, I needed this for my homework and this makes my homework more fun!

[@boofang10]

EXCELLENT video on the background of the barometer, especially the mercury barometer

[@malv4935]

This is awesome and so adorable, thank you :D

[@jp4431]

So much knowledge we take for granted today were such brilliant discoveries back then

[@hemanjalihemanjali2896]

nice to understand easily

[@tejasnimbkar694]

TED-ED team can you also make a you-tube video on Calculus
Just beginning of it. It would be great

[@nathanchen5375]

Fantastic explanation!

[@manallarrehemi5838]

I totally agree that the thinking outside the box " the tube " is always the right way to find solutions , even if the others do not agree with you
THANKS FOR THIS VIDEO 🥰

[@VVVV11995]

HOW INTERESTING! THANK YOU

[@Shinywhite]

Very good explanation, tyvm.

[@kaushikpawar7508]

Amazing work team💯

[@nileshvishvambhar6780]

It was Best explanation...
Thankyou

[@AbdulRazzak-sh8ks]

Very very thankful

[@FailCant]

Truly fascinating

[@awasthiatul51]

thank you.. very nice exlanation

[@alligrim]

Ted Ed saves my butt in my chem honors class every unit.

[@zaoshmakujina2215]

This cleared my doubts which arised in the chapter Mechanical properties of fluids thank u

[@superrandomuser]

same

[@billchoi2000lsc]

I love stories about challenging pre-existing theory and making major scientific breakthrough!!

[@yashchaudhary9596]

I understood the concept of barometer bec of your video. THANKS

[@abderrahimelboutaybi9018]

Thank you. Very clear and great explanation.

[@garydunken7934]

As usual, nice one TED! My 3 observations in this video:
1. At 1:34 Gasparo Berti pulled his idea from his arse, literally! Thanks for the funny animation.
2. Both Aristotle and Galileo behaved like jerks with regards to their knowledge of vacuum, albeit being good in other areas.
3. How brilliant both Gasparo Berti and Evangelista Torricelli were, for thinking outside the box (or tube like you mentioned in the video!)

[@PhysicsVlogs]

hahah u're right..

[@crashsitetube]

People also had a lot shorter legs back then. Between the Rubenesque women and short-legged men, it''s a wonder the human race has survived. But, enough inane silliness. Really good video. Thanks.

[@anugopan5]

CORRECT

[@dhanyak.j9618]

Awesome 😊😁😊😁😁😁😁😊😁😊😊😊👍

[@dhanyak.j9618]

Good morning. Good night. Good for the video 👍

[@priyalks1614]

its so so so lively and understandable
pls try your luck in many more topics

[@janvigupta558]

Thanku so much this is really helpful🤗

[@MukeshKumar-zv1wk]

fantastic way to learn

[@melashop669]

el vídeo que necesitaba ver, muchas gracias

[@baharosman1416]

Thank you!!❤️❤️❤️

[@sayemshahariaprethebe]

Thank you so much

[@vanshikha7179]

amazingly explained!

[@unskilled_i_guess]

this helped so much

[@amrh2688]

C très bien expliqué merci

[@novachan69]

Thanks dude u cleared my doubts

[@michaela9914]

Lovely explanation

[@drlefebvre8489]

Michaela what is mmhg

[@Jordan_Dossou]

@@drlefebvre8489 millimeters of Mercury

[@popogast]

Nice and descriptive explanation.Well done.

[@gurbakshkaur1213]

Its very helpful.😊

[@strider8050]

Thanks so much❤

[@youngwildandcarefree]

thank you for the help

[@davidbooth3285]

Loved the way Torricelli had his lightbulb moment with a candle!!

[@Pineapple_extract]

Great explaination

[@samspiker3901]

Thank you for the video

[@AbidHasan-tg7jo]

3:23 the 76 cm height should be measured from the surface of the water.

[@STAR.C455]

I’m a little princess 👸

[@STAR.C455]

Hi

[@wonderman8537]

Bye

[@Sama-pl2pz]

Ya... Good observation🤝

[@Gojoft.sukuna]

True

[@smoothieturtle5005]

thanks for the help

[@russel4942]

This really helps a lot and well-explained compared in schools

[@tueanhvu1627]

I can't understand the experiment until this. Thanks =)))

[@piggyparadiseplayz395]

This is a great video! thanks for the information!

[@jchae9820]

thanks sir!! very useful actually

[@theagent3551]

Thank you so much!

[@vinitaugaonkar4683]

it was fun and learned easily

[@salmamuhamed5728]

Great in a cute way. Love it. 👍

[@prashant.timilsina]

always such a wholesome videos✨

[@dunnuthalayellareddy7618]

Thank you sir

[@rawanreda6908]

That was really good !!

[@31896eneri]

Great story!

[@ceff01]

These are on planes for decision height altitude for anp/rnp landings in low visibility around mountainous areas

[@chow143]

Extremely helpful

[@artpage6546]

thank you so much!!!

[@farahmohumad5355]

sweet topic

[@MuhammadIqbal-dy5ks]

Nice way of teaching 😊😊

[@MuhammadIqbal-dy5ks]

Good

[@VyvienneEaux]

I really enjoy Toricelli and his result.

[@93mrravi]

Beautiful explanation!

[@priyankabhardwaj4590]

ted ed is the best!

[@PhilippKirchner]

Well made, and such nice animations ^-^

[@marafradella2712]

Thank you Philipp!

[@neethandwrittennotes6196]

Thank you !!

[@Ekhandle]

wow last line...Thinking out side tube♡♡♡

[@rameshdhandapani8191]

Thank you ted ed it was a great explanation. It was helpful,very

[@Evan_Adams]

So.... what happened after 2007? How do we do it now?

[@stephensnell5707]

If you aren't aware Aneroid Barometers are now used and will be forever

[@anubiswerelupe]

there is actually a question about barometers that I have been wondering.
Do you need to add water to a barometer over time?
I have had the same barometer for many years and only filled it up when I first got it. Over time, water has dribbled out of the spout during days with very low pressure. The barometer never seems to run out of water and keeps dribbling now and then. Do I need to add more water to it now and then?

[@NullNoxproduction]

I like these videos, so informative.

[@divachauhan7491]

Nice work

[@urvijain2823]

2:59 - I have a question here : If you change the amount of water in the tube will the water still drop to 10.3 m?
Amazing video btw, my teacher brought me here and I understood the concept of barometers so much better after watching this :D

[@Hope0fHumanity]

Yup it should. For example, if you repeated the experiment but with a 100meter tube, the water pressure in the tube is far greater than the surrounding atmospheric pressure so it would force the water out until the water pressure and atmospheric pressure are equal which would be when there is only 10.3 meters of water left in the tube. Correct me if I'm wrong TH-cam

[@tiaxanderson9725]

Yes, it's the weight of the atmosphere that's 'pushing down' on the water and thus 'forcing it up the tube'.
So even if you made a tube 1000 meters tall, all the water would spill out until it reaches 10.3m as 10.3m of water equals 1 standard atmospheric pressure.
It's also why the mercury barometer is only 0.76 m tall as mercury is much heavier than water. (so 0.76 m mercury = 10.3 m water = 1 atm)

[@josephcalabrese6337]

I'm watching this video because my new digital watch has a Barometer App.
Knowledge is power.

[@ultratuya2324]

Thanks ❤

[@user-fu6jb8df3o]

Thanks, I love it

[@shaziajehanzaib941]

Awesome animation and explanation

[@muhittinselcukgoksu1327]

the other TED videos are not so ..They are very well.

[@pranshgupta4826]

Thank you I don't know much about vacuum but it did help me with atmospheric pressure so thanks..a lot!!..

[@patriciayokelin9382]

I love the graphics of this video, the scientists are so cute!

[@hannahhoag8571]

This is fascinating!

[@mdabdulkafimia]

Thanks a lot

[@duckiie15]

Beautiful execution👏

[@nipuntheekshana6817]

wuu man this sounds great.. thank you😙

[@princessminnis-moss491]

verry helpful for my baby social studies

[@kottananarasimhanaidu4851]

Good job

[@hansbastv3873]

훌륭합니다.