Does a computer / TV / laptop actually send a (weak) radioactive radiation, or is that to be ruled out?

Electromagnetic cores are sent out with certainty, albeit in a different spectrum.

Certainly not today's devices, but that used to be different in the old days. The last devices in the PC area, which produced quasi radioactive radiation and emitted also minimal, were tube monitors. There, an electron gun shoots electrons through a shadow mask, resulting in X-radiation, which counts as radioactive radiation, comparable to gamma radiation (wave radiation, ie without particles). Therefore, the lead glass had to effect the best possible shielding, sometimes you can also at the back a note a la '"the resulting X-ray radiation is sufficiently shielded" or similar. See.

Further, historical sources of radioactive radiation in the area of household / consumer electronics: tube amplifiers, old starters for fluorescent lamps, old glow lamps, light color on old clocks, old cameras (lenses).

By the way, not every wave radiation is automatically radioactive. It is only when it is capable of ionization, which makes it particularly harmful, because it generates "free radicals" in the cells. So it's a question of energy, which brings a radiation.

For computers and laptops this is ruled out and radioactive is not the radiation, but the chemical element, or isotope, from which this radiation emanates.

There are the alpha (free helium nuclei), beta + - (free positrons), beta - (free electrons) and gamma rays (high energy photons) that have an ionizing effect. The greater the interaction with other matter and the larger and heavier the corresponding particles of the corresponding radiation, the deeper they can penetrate matter. Therefore, gamma quanta are the ones that can penetrate deepest in matter. While alpha particles can't even overcome the top layer of human skin.

In outdated tube televisions that did not yet have a shadow mask, free electrons came out of the so-called cathode ray tube, similar to the early radar monitors and the magnetron of a microwave oven, whereas a microwave, if you do not tinker with it, no longer has that protection is given, has such a shield that these electrons are limited to the interior of the microwave.

Electromagnetic cores are sent out with certainty, albeit in a different spectrum.

Electromagnetic waves are not all equally harmful. It depends on whether their energy per quantum of energy is sufficient to connect an electron with sufficient energy to leave its nucleus. Only this makes an ionizing radiation.

Electrons and positrons can do this only by their free presence, in electromagnetic waves, it needs a corresponding minimum frequency, which also describes the energy level accordingly.

Even the newer tube devices with shadow mask (for the color reproduction) radiate weakly radioactive radiation with a few cm range, since the acceleration voltage at color is 30kV, with black and white tubes it was about 15kV. The harmfulness of the radiation increases with the voltage in the picture tube.

Monitors also emit interference in the frequency range radio and TV.

Emit light radioactive radiation

As I have already written, although there are radioactive isotopes of chemical elements, but no radioactive radiation, because of the isotopes radiation goes out, but not existing radiation further radiation. But what makes this radiation so dangerous is its ionizing effect.

with a few cm range, since the acceleration voltage for color is 30kV, for black and white tubes it was about 15kV. The harmfulness of the radiation increases with the voltage in the picture tube.

Clear and light is limited in space, which is why lightsabers in Star Wars are only about a meter long.

It may well be that with more than a few centimeters in front of the picture tube, the ionizing effect diminishes so much that the associated risk of corresponding impairments drops to zero, but that does not mean that the exiting beta radiation would not go any further. The largest part of it is at least supposedly caught by the shadow mask.

Radio attraction = electromagnetic waves in the radar wave area.

abstrmeigend according to size, so ascending to energy content.

radio waves

microwave

Infrared

visible light

Ultraviolet

gamma radiation

Radio waves can hardly be dangerous to humans. At least not the little thing that comes from everyday electrical appliances.

Tube monitors do not produce radioactive radiation but X-rays

I wrote of "quasi" radioactive. Why? Because X-rays are enormously similar to radioactive gamma rays. Apart from that, have you ever been to the hospital for X-rays? Is always the radioactive sign to see.

Let's do the nonsense with the laser swords. I'm a physicist and therefore I know that beta-rays in air only have a very short range when accelerated at 15-30kV, and that (2) by irradiation of the shadow mask a weak bremsstrahlung in the form of gamma-radiation is produced, which also causes only a short range and low physiological damage due to the relatively low energy of the generating beta radiation.

Incidentally, I think your criticism of the casual term "radioactive radiation" for styling, everyone a little informed knows what is meant.

Incidentally, I think your criticism of the casual term "radioactive radiation" for styling, everyone a little informed knows what is meant.

But there are also those who are not informed and accordingly unfavorably formulated terms actually take full, from which then with little idea but much opinion in the consequence much nonsense in the world is set. Who is responsible for such nonsense? The one who knows what he spreads and knows that it is nonsensical in the literal sense of the word, or the one who throws around in terms of which he only thinks he has an idea, but which obviously is not given and from which emanate the wildest theories that are nothing more than nonsense?

Let's do the nonsense with the laser swords.

I wanted to do nothing but clarify that although interaction, radiation intensities and so on with increasing distance, but not completely disappear from a certain distance, but only weaker and weaker. As a physicist, you should also be aware of that. Likewise, this applies to both particle radiation, in particular beta radiation and also electromagnetic waves, including gamma radiation. The ionizing effect may be eliminated accordingly, but that does not mean that free electrons / positrons or energy quanta could continue. Although positrons react in contact with electrons, even then energy quanta would be released again, which can then again be ionizing with sufficient intensity.

Range means in this context that the effect, in particular the harmful, has a limited range.

There are known limits for many types of radiation in nuclear medicine. Your effect described in the last sentence is included.

The sign means "ionizing radiation" and is i.a. Both for X-rays and radioactive radiation provided.

Thank you. But you will not deny that the (harmful) effect of X-ray radiation resembles that of gamma radiation?

I definitely agree!