@BerkeleyLectureDemos so I took apart an old iMac with a CRT screen, there was an x-ray warning, do they actually emit x-rays or only when they are on or something, just asking.
@Mas7erChief117 X-rays are generated when a high speed electron (e.g. accelerated by 20,000 volts) comes to a stop by slamming into a target (e.g. front of the screen). The energy of the rays (how penetrating they are) depends on the voltage. More volts - more penetration. To protect the user, the CRT tube is made of lead glass (that's why they are so heavy - and so toxic for the environment). Normally virtually no rays escape, but if the voltage is set too high, they could penetrate the tube.
@739199 The X-ray tube is aimed at a phosphor that lights up when hit by the beam. Since it doesn't penetrate metal, we can see the shadow of the bear's skeleton which is made of copper.
@bdmaple no they dont because the tubes operate at certain voltages that are in the safe zone. that warning sticker only goes for the repair technichians so they know not to put the wrong part in. a smaller tube or a larger flyback transformer will create x-rays. i know this because i work at a tv repair shop.
Better that they now use a metal skeleton as a demo. The type of x-ray tube they have, a cold-cathode tube of the type commonly sold to schools as a demonstration tube by such as Rudolf Pressler, was often demonstrated with a person's hand, even up until a few decades ago. The paddlewheel tubes are still available, though not as nice as this one.
interesting video and very informative
willbirful 3 weeks ago
What's the voltage on the terminal so that the electrons are really able to push an object away?
gabriellando 5 months ago
if i use an electron gun of a crt and point it at a match will it light up?
chilidress 7 months ago
how did you construct this tube?
MadScientist1011 8 months ago
Surprised electron beams aren't used for beamed propulsion between satellites in space. Must not be very focused.
heroineworshipper 9 months ago
1:31 - LMAO :D:D:D
OnnomonnomonnO 9 months ago
@BerkeleyLectureDemos so I took apart an old iMac with a CRT screen, there was an x-ray warning, do they actually emit x-rays or only when they are on or something, just asking.
Mas7erChief117 10 months ago
@Mas7erChief117 X-rays are generated when a high speed electron (e.g. accelerated by 20,000 volts) comes to a stop by slamming into a target (e.g. front of the screen). The energy of the rays (how penetrating they are) depends on the voltage. More volts - more penetration. To protect the user, the CRT tube is made of lead glass (that's why they are so heavy - and so toxic for the environment). Normally virtually no rays escape, but if the voltage is set too high, they could penetrate the tube.
ChumpusRex 7 months ago
@ChumpusRex sooo i didnt get dosed? great :D lol
Mas7erChief117 7 months ago
Nice stuff!!
AcapulcoRenard 10 months ago
I hadn't thought teddy bear has bones....:)
Zsakf0s 10 months ago
If you read the description it said the stuffed animal had "bones" of copper.
robertmoffett1 11 months ago
=P
your Xray tube is fake!!
teddy doesn't have bones.
In x rays, bone are reflected because bones is concrete, which means it doesn't penetrate.
Lloydy9101 11 months ago
me 2 deaf
workingpendulum 1 year ago
yeah right!!!
jaybmustang 1 year ago
I would love to have this object. where can I buy it?
giakful 1 year ago
@giakful are you some sort of terrorist
timmy8911 1 year ago
Comment removed
giakful 1 year ago
lol i think you have a case for teddybear evolutionary changes!
daenumen 1 year ago
How did you capture the xray photo and if it was in the videos audio, sorry I'm deaf
739199 1 year ago
@739199 The X-ray tube is aimed at a phosphor that lights up when hit by the beam. Since it doesn't penetrate metal, we can see the shadow of the bear's skeleton which is made of copper.
BerkeleyLectureDemos 1 year ago
great!
sdfryc 1 year ago
Dude, thats fucking awsome!
THOMASOAKMAN 1 year ago
you do know that exposed crt's create xrays right?
bdmaple 2 years ago
@bdmaple no they dont because the tubes operate at certain voltages that are in the safe zone. that warning sticker only goes for the repair technichians so they know not to put the wrong part in. a smaller tube or a larger flyback transformer will create x-rays. i know this because i work at a tv repair shop.
iminyourbasement 1 year ago
analyze the circuit on end of the tube, then give the tube an equal amount power on both side, and look for you electron.
jexphe2k 2 years ago
can you say what`ll happen? i cant get it.but i am very curious.pleaseeee
zauraliyev367a2 2 years ago
the tube will not lit up, because of equal amount of power on both side.
jexphe2k 2 years ago
mmmm... x-rays....
nexx1011 2 years ago 12
Like, so awesome I can barely relate. Totally tubular, babe!
pantyflash 2 years ago 5
Better that they now use a metal skeleton as a demo. The type of x-ray tube they have, a cold-cathode tube of the type commonly sold to schools as a demonstration tube by such as Rudolf Pressler, was often demonstrated with a person's hand, even up until a few decades ago. The paddlewheel tubes are still available, though not as nice as this one.
JonasClark 3 years ago 4
that paddlewheel is awesome, that really shows how much energy they have
and your pretty brave to make a home made x ray machine lol
BrodyPianist 3 years ago 4