Light bulb filament

Bill takes apart an incandescent to show how the tungsten filament is made. He shows it in extreme close-up and also discusses the material processing needed to produce ductile tungsten.

[ohasis]

Here I am, 12 years after this was made and appreciating your work.

[naytchh]

2:52 "I love that!"
This right here is why this guy is a National treasure. He has an encyclopedia's worth of knowledge and wisdom, yet his love for engineering still gives him a child-like fascination with the nature of nature. It's infectious and makes me want to be as excited as he is. I hope to always have this sort of intrigue and wonderment about science for as long as i live.

[believethebook]

The better you know your topic the clearer and simpler you can teach it. These videos are awesome and this gentleman obviously knows his stuff. You have another subscriber.

[Xeroskia]

This guy has a really nice theme for his videos. Feels smooth and calming, yet lets you know that you're progressing through something significant. Really nice, when you think about it,

[abdussamedbilginer]

0:55 "if we zoom in a little bit."

*zooms 100 times*

[RafaelKarosuo]

I love your ability to condense that amount of info in 3 minutes, and make it interesting and yet, not overwhelming. Wonderful, Than you!

[tiotito]

I don't know if I'm more impressed with how the light bulb works, or with the way he took off the glass shell.

[justinsmith]

*Wears safety glasses to slowly cut glass bulb, takes them off to snap tungsten bar*

[ShazzPotz]

Lord thundering Jesus, does this guy make the best videos in the world or what? His presenter skills are excellent, his voice, tone, pacing, inflections, subject matter, and demonstrations are uniformly awesome. World class. He makes me revel in the engineering of things I'm not even interested in. Give this man a raise!

[xsbiggy]

for the most part he is correct, however, not every filament is the same. I work in a plant that manufactures incandescent bulbs, and depending on the wattage the coil will vary in size and length significantly. from nightlight/christmas light bulbs to huge stadium lights, each coil is different. also, argon is not the only gas used. sometimes argon, nitrogen and xenon are used either in a mix or independently depending upon the light output desired. also, red phosphorus is used to coat the coil before it even enters the glass bulb, that way, when the bulb is ignited for the first time, the phosporous will destroy any contamination and oxygen that may have gotten inside.

[warpatato]

1:02 "But if we look even closer, you can see it's a coil within a coil"

*INCEPTION MUSIC INTENSIFIES*

[ScaryTerry]

Love how well produced these short videos are. Great work guys!

[MinkytheMinkY]

You're the best! Clean, straight forward, you speak with clarity and at a pace that allows one to really take in the info. Thank u.

[guyjperson]

The thing I like is that everything you do is so concise. It's terrific.

[uberjuberduber]

Wonderful speaker. Probably never watch your videos if it wasn't for your awesome announcer-like voice and the ways you keep us interested. Thanks!

[CraigMerton]

I didn't know that producing the filament would be such a complicated process. There is one type of bulb that I find particularly interesting and it is the halogen bulb. I used to wonder what it is that makes it brighter and whiter than the regular bulb. What I found is that the halogen gas in the bulb makes it possible for the filament to endure a higher temperature without evaporating.

[Mekawyvid]

Guys like you are the real youtube stars, and videos like these give a true value to the very concept of youtube
Thank you sir

[anthroable]

This channel is outstanding. Interesting topics, slickly produced, and radio-quality-voice narration. Thanks!

[deemon]

Thank you Bill! Your videos are the kind of nerdy engineer-y content I crave but can find very little of around the web.

[xplosiv]

Words cannot express how much I love these videos!