Discovery of the Electron: Cathode Ray Tube Experiment

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J.J. Thompson discovered the electron, the first of the subatomic particles, using the cathode ray tube experiment. He found that many different metals release cathode rays, and that cathode rays were made of electrons, very small negatively charged particles. This disproved John Dalton's theory of the atom, and Thompson came up with the plum pudding model of the atom.

[Hiiarmy.]

I can't believe this video was made 10 years ago... The best explanation for sure... Staright to the point and deep understanding...
Excellent job...

[ambreentariq]

9 years later, and you're still a life saver. Thanks a ton for your efforts!

[alfredwhittingdale]

4:07 -- 4:20 I love how he managed to transform 2D into 3D. Brilliant.

[otamanlvhs]

Finally, a clear explanation that makes sense for dummies like me.

[tdewitt]

Great question! It gets a little complicated, but here is the basic idea. So you know how he is able to bend the ray of electrons by using a magnet? If you measure how much the ray is bent, you can plug that number into physics equations and figure out, roughly, how much the electrons in the electron weigh. And they already knew how much Hydrogen weighed, so when you compare, the electrons are a lot smaller. That's sort of a simplification, but does the main idea make sense?

[jackasotarex]

Not only did you do a really good job explaining the whole concept, but you also made the connection between the ideas of Dalton and Rutherford. I hope you continue on your journey helping education other in the sciences. It truly is a great help!

[heyyyu]

This was the best video to learn how electrons were discovered. Thank you so much! It was explained very well. :)

[bryand]

thank you so much! you have a very creative way of demonstrating the experiment using only paper and markers

[landenew]

thank you for teaching me while my teacher fails to do their job

[vicgamez]

How can 13 people dislike this video? Come on people! This guy is contributing his time and knowledge to help other people, so if you don't find it help, then just move on before you puss him off and he quits making videos and you ruin it for those who want to learn! Hey Tyler thanks a lot, u have learned so much from your video. You're my inspiration!

[gkreddy]

this video helps students to understand the experiment clearly

[Vtari]

Hadn't I seen the date of the video I would've thought it was made this year, just amazing.

[TarunKumar-xkpz]

come back bro post more vids we need u 😭😭😭😭

[tdewitt]

Hey everyone, I'm here to help. If you have any questions or just want to learn more, click on the link in the description above. It'll take you to a page where you can ask me questions.

[deyaaalmasri]

Awesome thanks this helped me study for my chemistry test.

[divyanshsingh]

It's amazing how clearly you aranged the papers to explain . Fantastic . I don't have words to explain how good you explained it. *YOU NAILED IT BRO*

[sunnysaurav]

Such an exact explanation, Even that below average students can understand this easily...

[andescosmico]

This young is very very smart. This video can't be improved, it is perfect. Not a single word can be added nor a single one removed. Ten out of ten. Now I know how I will prepare a similar lecture. Thanks and congratulations.

[christopherdiassous]

I love for your innovative method of showing things. Your language is easy to understand and definitely student oriented. Thank you !

[buteteniyoonjh]

Tyler: Plum pudding is more like a British thing so it's better for you to think like its Blue berry muffin

Me, an Asian: 👁💧👄💧👁