I think my head just exploded from how interesting that is.

Each and every video of yours is so thoroughly prepared and thought through, it's amazing! And I love how you make everything very hands-on

Can't wait for the next video Ben, and glad you gave Funk's channel a shout-out, they've had consistently awesome practical physics demonstrations for ages, highly recommended

Hello Ben, I can not believe it. My channel is booming !!! Thank you very much ... The MOT Magnet is a great idea! Many thanks also to the many new subscribers of my channel - I am thrilled!!! :-)

Just learned about this last semester in my electric, magnetic, & optic properties of materials class. Great demo!

I am so glad I have chosen to follow your experiments. I am learning stuff and you make it so easy and clear. Thanks. I'm staying right with you. Please continue.

Yet another excellent video... a perfect demonstration and clear explanations of everything involved! Keep em coming!

Such a great straight-forward demonstration! They should have used this for my undergraduate intermediate physics lab.

Thank you for explaining your setup and how you built the ballast for the LPS lamp. That is exactly what I needed to make one to view interference patterns with optical flat!!!

Cool stuff, I always appreciate your videos on any subject, well done.

Adding light to light to make shadows...

Can't wait for the video on core materials! This has always been a fascination of mine. With all of the different properties of permeability, saturation, and hysteresis; there are nearly unlimited core types, each suited for specific applications.

Oh man, I'm going to learn so much from a Ben Krasnow 'applicable magnetism' video, I've always hoped for a topic along those lines. Astounding content as always, you're one of the minority of youtubers that is still embracing quality over quantity.

I was just thinking about how you haven't uploaded in a while, and then you upload this. I truly love your content. It's always bound to be interesting.

I am always so impressed by the effort you go to to make these videos. Legend :)

my favorite channel over the course of years

Great demonstration once again! Also very cool to know that application of the Zeeman effect in sunspots. :)

Great video & topic. I'm looking forward to the next one you mentioned, too!

i love how you learned stuff too. stops it all from being so intimidating. good on ya dude you're one of my heroes. dont stop doing what ya doing. -pepe

That's a really awesome way to demonstrate that effect!

Super excited for the next video! I've been designing a permanet magnet(PM) coilgun, and have been struggling with the choice of all kinds of material.

You're awesome as per usual. Looking forward to your next video on magnetism.

That's so interesting and an interesting way to encode more information into light signals

you have a great setup and an excellent way of explanation

Very cool!

Excellent work mate. A lot of effort and great explanations.

Great video, thank you! It's realy interesting that there is actually a use for this lesser known effect.

Thank you for this videos! Next generations of scientists are very lucky to have you!

Looking forward to the next video. Sounds like a neat topic.

I believe the one spectral line initially is actually two very very close to each other, as electrons with different spin already have very slightly different energy levels. The magnetic field will massively exacerbate this difference. What an awesome experiment. Thanks for spending so much effort and time to build all that.

I can’t wait until your video on magnetism. My high school physics class briefly touched on it but it left me with more questions than answers. And I’m sure that even if my specific questions aren’t answered in the video I will still learn some thing.

The only reason you don't have a couple of million subscribers is because your topics are too complicated for the mainstream. But those who understand your topics (your videos) appreciate every single one. Thanks a lot for all your work.

Live this guys soothing voice.

Seeing your lab setup tells me you think faster than you can build the different apparatuses your using. Some out there should design a lab That is much faster something that each part is reconfigurable but fits together solid. However your doing a great job at combining speed efficiency and functionality. Keep up the good work!

I was just looking into this, thank you!

The narrow band of light missing was so cool. That was a great way to show this off.

Great stuff... next one sounds even better.

Wow... Really neat this setup! :D

Good to hear about the next video! I'm working on a multistage coil gun.

I need to watch this again .... too much information for my little brain that really wants to learn....thank you sir, your experiments are awesome.

Awesome video, I'll try building an powerful magnetic source and try seeing theses changes with my spectrometer.Thanks for the great content

I look forward for youre upcoming video. I wish to know much more about making the most out of an electromagnet

Great video! If you were to talk about hysteresis on next video I would love it. I'm currently learning about induction motors and it amazes me how many approximations are needed to be done. Up until the point of disregarding hysteresis all together; I guess if you are designing one you need to take it into account, but the textbook I'm following has no room for motor design.

Can't wait for the next video love the topics

Always something fascinating happening within applied science.

Btw. Here's a tip on getting. Microwave oven transformers. If you go to one of the electronic recycling days ( usually in supermarket parking lots on a specified weekend) the items that are usually dropped off are printers, monitors, and Microwaves. Almost all microwave ovens stop working b/c the magnatron burns out. Meaning the transformer is more than likely good. Slip the guy $10 or $20 and ask the guy for a couple transformers. Bring the necessary tools, dont make a mess, try to be inconspicuous, and try to reassemble it after you take it out. I asked the guy what they do with all that stuff. He said they all go in a big shredder, so it doesnt matter whats left in them. I managed to get 4 MOTs for $10. I could have got more, but I didnt wanna get him in trouble with his boss. A friendly reminder. The capacitors in microwave ovens can be hazardous even when not plugged in. Make sure the first thing you do when you get it opened is arc the cap with a screwdriver with one hand and other hand in your pocket. And maybe you want the magnets out of the magnetron. Be carful not to bust or scratch that ceramic thing. Sometimes they contain beryllium or barium (I dont remember which, but its highly carcenogic).

Very nice!. You take a lab curiosity and make it an undeniable, macroscopic demonstration. I will be very interested in your video on magnetic materials. We are building a large, permanent magnetic yoke to demonstrate magneto-hydrodynamic principles and applications. The magnets are easy, the steel and engineering are not. Cheers.

Very cool as always!

Pretty cool. I hadn't heard of that effect before this video.

damn, now you've got me all hyped up for the next video

Awesome opening animation!

Now that's the internet has really been invented for! Great channel, keep it up!

I think xofunkox has clear demo of light source being opaque and casting shadow... since as commoner by default we has relation opaqueness with shadow.... In your video that removal of particular frequency/wavelength of sodium lamp was made really clear what was actually happening...

The trick with adding salt to oil lamps in order to get a brighter stable and sot free flame was used in antiquity e.g. when decorating vaults where you didn't want sot on ceilings.

Wow, thats very nice. Good job

Just gotta say that I appreciate the 60fps recording method! And that's a seriously strong magnetic field at 1.2 Teslas! :O

Zeeman effect is a fundamental quantum mechanical effect. This demo is beautiful.

So interesting!

Looking forward to your next video!

Ben, Nice demo -- Exactly how my Rubidium frequency standard works. It uses a ~6Ghz signal to excite the Rubidium gas to absorb one of the spectral lines from a Rubidium lamp. Also there is a magnetic coil around the absorption cell to allow some amount of tweaking of center frequency or for temp compensation via the Zeeman Effect.It's cool to have a piece of equipment that contains a "Physics Package" at its heart. Craig in Sunnyvale. Would love to eyeball some time.

Love the use of the microwave transformers. 1.2 Tesla. That's pretty good.

can't wait for your magnet video. fill me with your knowledge!

The phenomenon of ions absorbing the light from a gas discharge lamp that uses the same ions is also an important part of the rubidium gas cell, which is at the heart of pretty much the cheapest kind of atomic clock you can build. In that case, hitting the gas cell with microwaves of exactly the right frequency changes the amount of absorption, due to hyperfine splitting, and looking for that absorption peak allows calibrating the microwave frequency very precisely.

YAY! A new video!

Its an incredibly simple but ingenious way to see the Zeeman effect.

Awesomesauce ! Can't wait. :)))

Every patreon's got his 1/10th second of glory :-)

Your experiment made me wonder if the flame from the candle was an ionized gas, and that’s what was causing the flame deflection in the magnetic field. To test my idea, I put a candle flame between two aluminum plates about 1/4” apart and applied about 200 volts dc (power supply max.) across the plates. As I switched the voltage on/off, movement of the flame was quite noticeable. I bow to better minds than my own, but this and your magnetic deflection makes me believe we are working with an ionized gas.

Cool thanks a lot for the neat video!

It's really nice to original experiment

Looking forward to that next video

If you will, light is also an electromagnetic wave of a visible spectrum, certainly respond to static magnetism. A component in the microwave industry makes use of a polarized H field to divert polarized microwave wave in a transmission line/guide away from a first port into a chosen second port, called a circulator. The difference is that you have a non polarized light wave passing a non polarized media immersed into a H field. It is also interesting to see what if an adjustable polarized media is inserted into that H field. Love your experiments.

+1 for having your power strip (on the front of the bench) oriented the proper way (earth pin up).

I can't wait for the next video.

You are an inspiration

Super cool your electromagnet......

Great content as always Ben! Keep it up!

great job!!

Looking forward to your next video on magnetics.

Well done video, I enjoy most of your videos quite a bit. I was curious if you could tell me what sort of ceramic rod you're using and where you source them? Also if you're immersing it in a pure salt, or more detail on that method would be lovely.

Thanks for the video.

I can't think of a practical reason I personally would need to use this effect but this kind of video has me mesmerized. Very fascinating and well done, as usual!

i cant wait for the next video

You don't need large magnetic field to get Zeeman effect. In HeNe lasers, the Zeeman effect is exploited to allow the red line to operate. Normally, in longer lasers, the 4 micron line dominates, because its gain is on the order of millions versus the 1.05 gain in the red. This is because of another wavelength-shifting effect, doppler shift. Doppler shift is proportional to frequency, so the red line is shifted 7 times more, leading to the lower gain. By putting small, weak, permanent magnets next to the laser tube, the 4 micron line is broadened because of the "random" nature of the field. So a complicated problem is solved by "simple, sloppily-placed, weak, magnets". You don't polarize the light. Zeeman effect is function of relative orientation of polarization and axis of the magnetic field. You probably get stronger visual effect adding polarizing filter. Have you tried putting sodium in glass tube, sealing it, and heating one end?

hang on a minute.... are you sure the mag field isn't deflecting the flame ? ... the ions of the flame will be moved by a mag field so surely the flame will be deflected.

great video

Awesome, Ben! The sodium emission lines are fascinating to me. I've read somewhere that San Diego county previously required all street lights to be LP or HP sodium arc so that their emissions wouldn't obstruct Palomar Observatory. IIRC Keck (and many other observatories) use sodium guide star lasers for the sharp emission lines.

I love your videos

Your video put my brain into MPMM (Massively Paralleled Microprocessor Mode)

This dude is awesome!!!

Wow, amazing, loved it. Also can you do a video on stark effect? I haven’t checked if you did but yea

Looks like you've gotten pretty economic as usual. Jolly good.

For reference, most phones have field meters for orientation. Really handy.

OMG... You are the BK of the nitrogen liquefactor! So cool experiments you make.

Heads up Ben, Tesla is misspelled in the description. Enjoyed the video!

Love it. See ya next time, bai.

This give me a idea to use in my lasers.

When viewed through the diffraction grating it looks like a test pattern on a TV screen.

I really enjoyed your demonstration of the Zeeman effect on Sodium lighting. Your use of a diffraction grating clearly showed the spreading out of the spectral lines in the gas. Clever construction of the electromagnet caught my eye, I have used those microwave transformers as well but never knew you could get a 10600 gauss field from them in that way without overheating the magnetic circuit core by eddy currents and the fact that the core material is driven hard into saturation. That would explain the current draw and its impedance. What I'd like to see is the ferromagnetic resonances (such as with isotopes of iron, perhaps fe^59?? not sure of my bandgap and isotope number there!!) using Larmor precessional values of the iron itself. Perhaps an rf amplifier would show those effects and if tuned with a low frequency pulsed direct current at low frequency (adiabatic invariance over the fundamental resonance of an infinite long slab) the double resonant Overhauser effect may show. Lots of integrals flying around there, but an amazing show of the torque of a compose compressed and twisted field line (at saturation!!) decoupling protons from the nucleus. Amazing video. I hope you do more.

You are the man!