Cathode Ray Tube

Demo 10 HChem
"As the cathode rays carry a charge of negative electricity, are deflected by an electrostatic force as if they were negatively electrified, and are acted on by a magnetic force in just the way in which this force would act on a negatively electrified body moving along the path of these rays, I can see no escape from the conclusion that they are charges of negative electricity carried by particles of matter."
-J. J. Thomson (Philosophical Magazine, 44, 293 (1897))

[@Sarah-lr6vp]

if schools taught us this way, we'd definitely be more interested

[@virudabas2989]

how school will taught even they are not having such materials which are required to conduct the experiment

[@seantheguy1391]

nakul and Kyushu nice English dumb ass

[@aham2410]

Sean Madden, C'mon, they clearly aren't native English speakers, you should be ashamed of yourself cause you seem like a native English speaker yet your grammar isn't that good.

[@techsunday]

So true

[@SanjayS-ew9hm]

Sean Madden lol sean, u r so true. These idiots spoil english

[@timbariuan799]

Its crazy how recent some of these comments are despite the fact that this was posted more than 10 years ago

[@025saidevaharsha5]

Yess

[@alexdaddario6848]

lmao watching after 12 years😂😂

[@Fxxk3]

Damnn I was in kindergarten when this video was made😳

[@alexdaddario6848]

@@Fxxk3 I was 4 years when it's made

[@giggletub]

ElectroBOOM sent me here.

[@dchummer]

Thank you to everyone who helped this video reach 100,000 views.

[@bestiethegamer3867]

Sir thanks but this thing shall be done in every school

[@dakshpokhriyal]

Sir, This Is very good !!

[@Alkakumari-vt4ki]

It is very interesting video and very helpful in lockdown so, Thankyou so much 🙂and may God bless you and your family

[@rohanrogers720]

Sir this is so cool please put more videos like this it's really educational

[@varshkallannavar2443]

Sir....... Can u say why that is green in colour...... But not any other colour?????

[@ReyAhamed]

Better than text book explaination!!!!

[@aryan8684]

I study it in 9 class

[@adaiser7844]

@@aryan8684 me too

[@pappudhor9335]

Obviously

[@jekaaai]

Ikr the textbook part is like an unknown language to meh

[@cbatchmath7772]

@@adaiser7844 me at 7th

[@moohy]

Such a good teacher! I tried to understand from the book but this explanation was clear and informative!!

[@rishavkumarxc4483]

😎

[@vlogging259]

Yes

[@3__59am_____editz3]

Indian students has seen this only in pictures Yet after paying thousands of rupees in school( business) So interesting want to see this yr😋😔

[@laavanyarajan4444]

How we wish we too were shown these.

[@zepetoons8709]

yea😕

[@renuy226]

True😞

[@ravenroth7460]

Brazilian students too...

[@sciencebugs3227]

Really very true...

[@-Tecky-]

I'm a college student and you can tell this guys is an excellent teacher, you guys are lucky! He explains everything so thoroughly and you can tell he enjoys the subject matter very much.

[@BonesBelieber1424]

Omg. You explained this so well, this saved my test grade. Thank you

[@dennishummer6963]

I'm a bit late, but thank you to everyone who still watches such stuff. We've reached over 1,000,000 views! BTW, I'm still teaching high school chemistry. I'm currently in Idaho Falls, ID (USA)

[@dchummer]

Dchummer CHEMISTRY…

[@VG__]

🥺God bless you, I really wish Indian schools impart this kind of education 🌟❤️. God bless yu a million and more🥺❤️🌟

[@miketrissel5494]

70 years old, been in electronics for 50 years. Very enlightening presentation. Even better yet, I am proud to see anybody that knows electricity is electrons flowing, and they go from negative to positive. The major publishers and educators pushing for the last 75 years to make a positive to negative current flow, including arrow direction on transistors, at least to me, is a crime against common sense. I will recommend this to anybody new coming along. YOU ARE A GENTLEMAN AND A SCHOLLAR!

[@kinggringo4802]

I wish my science classroom was this interesting

[@KrynslerR]

Very helpful! Awesome teaching! Just one thing: If I'm not mistaken, there isn't a vacuum inside the tube, but there's actually a gas at very low pressure. ( most commonly 0.01 mm of Hg ) Please correct me if I'm wrong anyone; always willing to learn more.

[@defeatedskeptic311]

Kryn Rebello From what I have read you are correct. It is a near vacuum, and not a perfect vacuum.

[@rohnitnair]

Yes, so that the air molecules do not react with the electrons.

[@gilbet]

Yes, if it was a true vacuum, it wouldn't work because there would be nothing to carry the current. No atoms means no plasma. In a true vacuum, you can apply all the voltage you want, but nothing will happen.

[@rickycool6083]

it would work. we actually dont want any atoms in the tube the voltage is applied from outside and also electrons from a outer source. We just want to see the electron movement in the tube.

[@shashwatchamoli7221]

kryn u are correct

[@FinsterCS]

This is one cool teacher

[@jtoonzkun6480]

Truly a wonderful and illuminating demonstration.

[@aaravmandal6341]

learned more in the past 2 mins than I did in the past 3 days in class. We need teachers like these.

[@TitserEnzymeTV]

AWESOME, this is the best illustration of cathode ray tube experiment!! Ive only seen this in drawings. It is amazing!

[@creartostudies1386]

😊THANK YOU VERY MUCH 😊 This is exactly what is said in NCERT chemistry textbook of 11th standard. To my surprise, what I imagined about the experiment I read in textbook is same here. Even few sentences that he said matches accurately with the information in the book.

[@wetoocandoit]

How was ur 12th boards

[@frankcastle1862]

Wow almost like we observe and then write the results

[@Ardhra008]

2024-25 batch here 🙃

[@ElectroBOOM]

Nice experiment, although I wouldn't say the pole of the magnet is negative.

[@troubledouble106]

Wow electroboom! Hi

[@JesusTorres-yr9kw]

LMAO im doing my semi conductors class, so funny i see you here

[@beccashie7702]

Respect for this teacher. 👏

[@Error403HRD]

Amazing work, I've been slaving over a textbook and didn't understand it, a visual presentation helps this make so much more sense!

[@ManpreetKaur-kn1cz]

Easily understood the concept with this video. Excellent explanation sir, Thank you!

[@rkaiser1333]

3 minutes of this guys video taught me this concept and the profundity of it better than three weeks of college chemistry

[@puzz88]

wish this was my science teacher?! (though my 10th grade science teacher was a very good teacher as well) wow so easy to understand and a great visual and an important concept and with some history integrated in too!! [EDIT: after reading comments, wow you guys are all so knowledgeable!! thanks for teaching me, all of you]

[@amarnathbarman8812]

puzz88 where do u live ...if u live somewhere in kolkata then plz give me the teachers no ...i need a good science tutor

[@thebhumiraut6446]

The best part was the deflection of the Cathode rays !! That seems so satisfying !! Now I Easily understood this concept ..Thank you so much sir ❤️

[@eengellyn]

it really is difficult to imagine how things work and look when images/drawings are only given to you, thank you for this actual demonstration

[@mesopotamianprincess]

Explained the significance and magnitude of the discovery as well as the design of the device so well! Great job!

[@DarkJusticeZ]

DUDE THIS IS AMAZING!!! TEXTBOOKS ARE USELESS THESE VIDEOS MAKE ME UNDERSTAND THIS SOOOO MUCH BETTER THANKS DUDE!!!

[@SLA-yo4is]

What are you doing now buddy

[@zerkalt190]

do you still have this account?

[@nathanielnatejacobs4619]

Probably, the best video to prove science is the best subject ever ! Thanks a lot !!! Honor, Respect !

[@satviktripathi9405]

I just studied about this today in class 9,and didn't understood what the experiment would look like THANKS u helped me a lot...

[@zubairkhan-hh5gj]

I wish if we also had such kind of practical demonstration It was helpful and nice. when we see something actually happening in front of us we understand it clearly.

[@RicardoAlves-nm3cf]

Finally a video showing the magnet effect. Thanks!

[@JoWackk]

Thank you! I love this video because it presents a clear visual of how the experiment works in real time and you quickly describe the conclusion of Thompson. I was having trouble picturing it for my college lecture so this rocks!

[@dronpatiyat8672]

people make 30 mins videos on this topic, school makes long presentations that take 45 mins or so,,, but this 2 min video educated me more than any other video or ppt

[@emreastarcioglu1875]

Thank u for video. I didn't get how it work at school and also thanks to your professor for his clear explanation.

[@loganwolf8025]

I just read about cathode rays on a website but just wasn't able to visualize what they were even though I understood the explanation.Thank you for uploading this video :)

[@chemistrywithashishsir9141]

This video is a contender for "must-see videos for Science people"

[@jaykobwalson1941]

Nobody: Tompson: I have proven particles in atoms are real! Dalton: *WaIt, ThAt'S iLleGiAl!*

[@jasmine_3333]

Lool

[@nofekun1889]

I wish my teachers were as good as you. They just draw the figure on the whiteboard and blabbles throughout the class lol :(

[@asthaverma7128]

Why can't yt recommend me this

[@Aditya91z]

Thanks a lot sir, your video has improved my understanding on this topic. Your way of presentation is awesome!!!

[@rafatdeshmukh9257]

Very much better than teacher's boring lecture👏👏👏

[@GG.TheGamingGuy]

Thanks sir👍 It helped me a lot to understand the Cathode ray experiment. Things are more clear more here than the textbooks.

[@auchityamishra7069]

This is how education should be.. Loved it sir 😊👍

[@pgdtourpgdtour]

i wish I had a teacher like this ! inspires a interest in learning when speaking and shows he cares

[@waqqas_the_wicked]

See now this a good education video. Concise, clear explanation along with a simple demo. Much better than those Vsauce, MinutePhysics and Hank Green channels with all their lame puns, corny antics and explanations given out so fast that by the end of the video you're not sure if you understood the topic and can vaguely recall the points that were made.

[@ranasstories8414]

Thank you for this effort♥♥

[@UltimasIsland]

Essentially this is the first "video game"

[@OfficialMCSquared]

How?

[@UltimasIsland]

Look it up, this was how they practiced with them

[@psilocybin3819]

table top tennis was a game from this thing...im sure lsd helped

[@Felipe-sw8wp]

subatomic PONG, LOL

[@Felipe-sw8wp]

@j I didn't remember about my comment anymore lol. I've just checked! Cool! Apperently it was played in an oscilloscope! Neat

[@neelamjha600]

Thanks Man!!!! Helped me a lot to understand what actually J.J. Thomson did. Thanks !

[@bearlogg7974]

Love how we discoverd this and went ”Ah yes lets call it a magic eye & put it into our radios”

[@RiskierGoose340]

Mr walker is watching every move I make right this moment

[@fabptl4981]

After saw this experiment i am fall in love with science

[@gangaseenigama5896]

Thanks a lot for the cathode ray practical...

[@selberenova]

if only india had teachers like you.

[@davelowe1977]

Thompson won the Nobel prize for showing that the electron was a particle. Then his son won one for showing it was a wave. Fortunately, the science wasn't considered settled.

[@tanyasinha8766]

wow, this was such a clean and clear explanation. Really got me interested the whole time! thank u for posting this video!

[@AllAboutMac27]

OMG! That literally was better teaching than my teacher will give me all year! He told us to go on a website to find out what this was all about :(

[@ReemAlshaher]

Honestly. I wish my teacher taught this way...he is so dull and monotone and we need more teachers like this guy that simply just explains it in an easy matter. lol

[@gaurivarma4615]

dchummer thanks for the experiment it could be easily understood with this , as the topic is quite difficult to be understood but this is one of the best , once again thank u

[@thakyou5005]

How does the video quality look so good given this was shot 14 years ago?!

[@paromitanath2624]

Wow it was actually nice

[@adrianam3608]

Dude sounds like Nick Cage for some reason :P

[@j.p.3891]

Adriana M lmaooooooo

[@illumanarti]

now i can't unhear it

[@ATRMadcatz]

Way better than my physics teacher! Awesome video!! Wish I had a teacher this good

[@mattacat3802]

Francis Davison I agree

[@sazupollo5752]

Francis Davison wish this man was my dad

[@mattacat3802]

I thought I was your dad

[@abreb2620]

This is a very good experiment. It has interested me a lot. Very nice 👍

[@nithilababupadippu]

This really helps a lot in visualising the subject very well!!!! Thank you sirrr ❤

[@dariinfotech]

What would it be like to have such a great teacher with all these practical methods :)

[@poorvik.bpoorvik.b3741]

Thank you sir in our Vidya Soudha Public School they thought 🙏

[@ahadamraan8090]

Indeed! Well explained. Hope India learns it at the earliest to provide this kinda education. Theoretical explanation is not enough and unsatisfactory!

[@EthanNikelsky]

I'm fascinated by the Thomson's experiment. Thank you for replicating and documenting it! I'm wondering what other possible explanations for what Thomson saw could have been (and most likely were) proposed

[@dhruvsovasaria]

If our schools would have taught this way , we would never get bored!

[@Noob_2104]

Indian education system sucks Hume bhi esi padhai chahiye...

[@tesakun3133]

This kind of things need to show on school.

[@squidpq]

Thanks for posting the video. I enjoyed the demonstration and the explanation.

[@kabir7898]

now this is what I call a real science class

[@labheshkumar7825]

Damn! This Explanation was so GREAT!!

[@shreyan80085]

I wish schools in India would explain concepts like this.... *Experiencing* the concept, realisation of the concept....

[@adityajain5047]

bhai online classes chal rhi hai mere teacher ne humko ye dekhne ka bola

[@pesmaniac99]

I wish I had teachers like this when I was young!

[@guc_sl]

is this available on steam, how many fps can it go up to

[@nitinsinghkushwah]

hahahahah XD

[@raggedybritches5798]

Nice demo but the explanation about the relation between the magnet polarity and the deflection of the ray is wrong. One would need to reason more carefully about the direction of the B field due to the magnetic dipole and then use the right-hand rule to determine the direction of force on the charges (qv x B).

[@Rookiee644]

This is incredibly interesting!!!!! If Indian schools have shown this then we would have a bright future!!!

[@jrv01007]

I believe there is an extremely small amount of gas under low pressure in the tube, not "no gas". The reason why there is a beam, is because there is a small amount of gas with electrons that are fluorescing, right?

[@vinayaksharma795]

EXCELLENT DEMONSTRATION

[@demonscar24]

best explanation i have seen so far thnx

[@mubaris.s]

i studied this at with my chem book.. it's so interesting when you have home teacher to get help with your studies.

[@jitendrakumargaundjitendra2081]

Sir cathode rays kyo hara rang hi utapann karte hai

[@black_jack_meghav]

Thanks my dude! We need experimentalists like you in science!

[@knvcsg1839]

Oh! It was nice. The video's clarity is only thing that had this down.

[@JaiiKaiiLove07]

this chem teacher is very good.

[@Herman9419]

@jrv01007 I agree with you, there must be some gas under low pressure in the tube. Otherwise you wouldn't see the beam of electrons until they'd hit the wall of the tube, because they can't interact with particles when there is a vacuum in the tube. Electrons are mostly made visible with hydrogen under low pressure. The color of the beam seems to point to hydrogen as well, for it has a major spectral line at 486 nanometers, which is the wavelength of some blue- greenish color.

[@kitzayitzay]

nice work.....heaps of help....appreciated

[@urmomia69]

is there is some idea to made this at home at cheapest cost?

[@AK-hd5gh]

thanks for sharing this makes my chemistry research so much easier now

[@medukameguca5071]

For a visual learner like me, this video's a blessing. Wish my school taught this way :-/

[@DisneyFan2OO9]

understand the CRT experiment much better by seeing it! Thank you for this video!

[@tonie374]

Great video!

[@ravindranathhospital1362]

I actually have a channel cAlled history of science and for one of my videos, I needed a cathode ray tube. We though they would not let us borrow it, but they let us keep it. 🙌 best day ever

[@HeroHero-vg2sd]

I don’t understand. How to pass electron anode to cathode in the vacuum ? No gas, no air, then what is pass it?

[@SmittenKitten96]

My professor explained this but my dummy self never fully understands everything. Once I saw this and saw you place that magnetic field I got it instantly.

[@lanamiran9941]

such a great teacher, i couldn't understand the book but i can understand know!

[@ashphil]

Nice demo, but there is no negative pole of a magnet: the poles are not attracting or repelling the electrons. The force on the electrons is at right angles to the field and their velocity. The magnet is behind the plane of the tube, so there is a horizontal component of the field, which deflects the electron beam vertically.

[@rickycool6083]

magnets do have poles...-_- both positive and negative.

[@ashphil]

Magnets have North and South poles. Positive and negative refer to electrical charge and are not alternatives to North and South.

[@rickycool6083]

Ok thanks for the info. Can you explain what electric poles mean exactly ...and yes i was refering to north and south poles and the guy in the video referred the same i guess.

[@damonjackson5857]

no magnets can attract and repel electrons

[@aienbalos]

This video was really clarifying, thank you.