whaaaat... whoa. thank you for the demo. haven't seen someone do a practical of that before.

thank you so much for this video. Visualizing the theory always helps!

thank you so much for this demo its so so useful 🙏🏻

thanks bro clutch video! very useful and concise :D

Thank you for making this video. :)

Wow this is dope!

WHAT HE SAID WAS I can actually show you that with a real charged beam. So this is an evacuated tube and it puts a big negative potential on this electrode. So high that it actually boils, electrons come off the electrode and makes just a beam of electrons. It also has some ionized, a little bit of a background gas that ionizes to keep everything stable and doesn't charge up too much. But mostly you have electrons flying off this electrode and most of them go straight to this metal plate and that's the end of the story. But there's a little slit in the plate. So some of them get through and make a beam that keeps going. So you've got a beam of electrons and this little plate is tilted a little bit so they slowly along this direction they crash into the plate. The plate has a phosphor on it so it lights up when they crash into the plate. So when I turn it on, there you can see the beam. That's a beam of electrons flying through the tube. So what we're going to do is bring a magnet and see what it does to the beam of electrons because remember this bar magnet, the field lines go from the north pole, the red is the north pole to the south pole. So if we just think about the poles or the field right at the ends because we're going to use the ends, it will be this way near the north and it will be pointing in in the south. So I will bring the north pole pointing at me at the beam and let's see what that will be. We have the beam going this way and I'm going to bring this pointing in so we're going to have a B field like this. So V cross B also the same as this. It should be up. So let's see what happens. There's our beam and I bring in this magnet. There's the deflection we hope for but it's down and it's down and why is it down? It's down because they're electrons. Q in this case equals negative E. The charge is negative. When the charge is negative the force magnitude is negative which means it goes the opposite direction. So right hand rule says it's up for positive but the force is down. for an electron. So it did deflect the right way. It deflected down. We can also check. We can take and aim the south pole at the beam. So here we go. Bring in the south pole. And there it goes. It deflects up, just like you'd expect. Because when you're bringing the south pole, the magnetic field is pointing the opposite direction. Now I'm bringing in a field that's pointing away from the beam. So it would seem that the charged particle beam really is deflected the direction that you would expect.

what a very nice demonstration of a charged particle trajectory I am your new follower

That is sooo amazing

wonderful!

Thanks for more understanding this concept.

This is how CRT display works

So that is a simplfied mass spectrometer

@Physierge 1: if a moving electron creates a magnetic field, why don't the moving electrons create a magnetic field that gets pulled toward or away from the bar magnet instead of getting pushed up or down? 2: why does the moving electron behave as though is creates no magnetic field? 3: is the bar magnet really pushing the electron beam up or down because thats how a magnetic field interacts with an electric field?

Nice demonstration. From which company that electron beam demonstrator can we buy for our college? and what is its price?

If you can bend the beam with magnets I have one hell of an idea for flight thrust

I did this as a child with a magnet on my BW tv set.

Awesome

The more interesting questions is, does a beam of electrons create a magnetic field? The relativistic explanations usually given for magnetic effect are very confusing.

Could this be that the magnetic field changed the angular momentum of the charged particles? What would happened if you were to point the magnet from top or from bottom? If my theory is correct, the path of the charged particles would still follow the path.

Maybe the russians in moscow will like some lessons on particle-electron beams.

It's a stupid question but can we use this as a light source?

Hola, profesor, disculpe que le escribo en español. Quería preguntarle si ha experimentado con dos tubos en paralelo, para observar la desviación de los haces de electrones, debido a sus propios campos magnéticos.

So that means cathode rays deflect perpendicular to magnetic field

Sir, how much vacuum should be there? Will it work at 10^(-4) mbar vacuum? Regards and Thanks

What if you put the South Pole parallel to the beam at the opposite end of the tube? Would it turn into a standing wave?

Sir, how can we create a negative or any positive potential

Alright please clear my doubts ... It is said that an electron in a magnetic field is not repelled nor pulled by either of the poles .. Why? And how a diamagnetic material magnetises? Or how is it able to produce magnetic field that repels the provided external field ? ...

I wish you were in my college

Do the electrons give off photons? If so, can you separate the photons from the electrons or ist it just a matter of imagination?

He said the an electron beam could carry a charge, what would happen if you sent a large charge in the beam and discharged it somehow?

At college you pay to eat huge and clueless amount of knowledge, hoping one day your abstraction skills will put everything together to find a solution for a problem you were not exposed while being a student. This channel does the opposite, that is why I'm pushing the subscribe the button.

They always erase the board before I am done writing it down. --> Me...1980,81,82,83.

doesn't the cathode radiates its excess energy to be amplified by the only exit available thru the little slit to the ions in the tube, similar to a laser, and the cathode provides a path for the energy to flow back into. And what we see are not electrons but the radiation emitted as visual light from the ions in the vacuum tube. Is there other demonstration with zero ions insides the tube? Zero ions as measured at zero kelvin, no free ions energy in the vacuum which can demonstrate the flow of energy current only by the emission of "electrons".

Why is it blue I thought cathode rays were greenish

Nic it's ray gun's formula

I'm in 11th and I'm not getting it.

Why is it blue

How to make beam

E|ectronsAreAlsoAcceleratedOrOnlyDeflected?

this shit is not even fake

You rmember me thé Kaaba..mekka..wich thé Muslims turn around like magnétique positions.