Do some lightbulbs produce x-rays with a wand?

No. Some small household lightbulbs have sufficient vacuum that the glass has a greenish glow (fluoresces) when used with a violet wand. When this happens, they are producing cathode rays, and it is the same thing happening that causes your CRT computer monitors or older television screens to glow. Cathode rays produced by these old tv monitors can cause a geiger counter to tick, just like the smaller household lightulbs will with a wand and when reading their cathode rays, but neither of these are dangerous. However, you -can- get x-rays from a violet wand — but to do that, you need a -very- high vacuum tube, such as the antique radio vacuum tubes found in very old radios and televisions. Again, it will have to be a very high vacuum. It can be done with these antique tubes, but no lightbulbs have this type of very high vacuum.

Leave a Reply