this post was submitted on 26 Sep 2026
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Just in case anybody is stupid enough to believe this, there was nothing radioactive in old CRT-based TVs. And they sometimes had black cases but weren't a "black box".
They worked by bending a beam of electrons that hit phosphors in the screen, which is cool enough that saying stupid BS about "radioactive" is unnecessary.
CRTs can emit X-Rays, but they are properly shielded so they never leave the tube.
The X-Ray scare mostly came from a line of GE TV's in 1968 that had improper shielding and had to be recalled.
Radioactivity and X-Rays are tangentially related, but they're not at all the same thing.
One is from a decaying material and the other is from controlled electron beam, but they are both radiation emitters. People are just more familiar with the term radioactive and think it is the catch-all term for a source of radiation.
The electron gun in a tv and in an xray machine are pretty similar and without shielding, you will still get hit with radiation even if it isn't strictly radioactive, but rather another type of radiation emitter.
Specifically radioactive decay.
So, not radioactivity.
Radiation is a really vague term. It's just energy moving in the form of waves or particles. Sunlight is radiation. Radio waves are radiation. Microwaves are radiation. Wifi is radiation.
Radiation can be dangerous in a few ways. Something can be very bright and blind you, or it can cause you to heat up too much. X-rays are an example of ionizing radiation, that's dangerous because it can break apart molecular bonds, causing damage to cells. That's why you can get skin cancer from ultraviolet radiation. X-rays are a shorter wavelength than ultraviolet light, so there's more potential cellular damage per photon.
But, radioactivity is dangerous not just because of X-rays, but primarily because of alpha and beta particles, and because of even higher energy particles like gamma particles / rays.
So, just because there's one type of ionizing radiation that can come from a CRT-TV that is also peripherally associated with radioactive decay doesn't mean that there's any connection between a TV and radioactivity.
That would be like saying that an atomic bomb causes a huge explosion, and a fertilizer bomb also causes a huge explosion, so a fertilizer bomb is a nuke.
Yes the humor was in the vagueness
This isn't me arguing against you because I know very little about the difference. But when I started reading I thought this was a Unidan copypasta 😂
Let's say it cooler: they were particle accelerators you pointed at your face.
Also, massive glass vacuum bottles that could implode if mishandled.
And with massive capacitors that could electrocute you if mishandled.
And heavy enough to seriously crush your foot (and possibly implode and electrocute you) if mishandled.
And the static electricity felt really neat on the back of your hand if you put it close to the screen.
They were so fucking cool, and we took them for granted, and now they're gone, and life is significantly less cool without them.
But by fuck was their capacity to put out a clear image mid. But their screen size on the other hand …extremely limited
TVs, maybe¹. CRT monitors, though? They were great. And mostly didn't care about what resolution you threw at them.
If you squint, you can make the right side look like the left side. Kind of amazing. Instantly increase resolution with this one weird trick.
They looked amazing for games designed for them, specifically because they blurred the pixels. If what you want is crisp lines or vivid colors, CRT works against you
What game is this?
First one is from Final Fantasy 6, second one from Castlevania: Symphony of the Night.
Sometimes. Other times they were little portable things.
I mean, sure. But even this little 4'' “pocket” thing, for instance, still weighed 1.2Kg... that's a damn dense (and expensive) brick to drop on a toe...
1.2 kg isn't very much, especially for a dense piece of electronics.
If you look at the history of iMac computers, when they went from CRTs to flat screens they only dropped 6 kg from 15.7 kg to 9.6 kg. Since then they've focused on making them lighter and lighter, but it's not like the CRT was the majority of the weight.
they did emit x rays but most of them was blocked by the leaded glass
Barium glass.
Leaded glass was only used for the rear of the tube (or amber monochrome displays), the front glass was barium infused for colour CRTs.
Radioactivity and X-Rays are tangentially related, but they're not at all the same thing.
I like this comment except for the fact it seems needlessly hostile
Someone not knowing there's a difference between "radiation" and "radioactivity" doesn't make them stupid.
No, just ignorant. Very ignorant.
It's the equivalent of knowing the difference between "poisonous" and "venomous"
For the vast majority of people it doesn't matter. Maybe they learned in 8th grade, but they forgot, because it never came back up.
Not really. Radiation is something you encounter every day. Radioactivity is something you probably never encounter. Most people except Australians rarely encounter poisonous and venomous animals.
Poison is something you encounter every day, too. Not poisonous animals, sure, but poisonous substances.