OT-ish - old Hughes video projector

[Sridhar Ayengar]

der Mouse wrote:
>>> I had a GE theatre size projector which had an integrated CRT.  It
>>> used such high voltage to zap phosphor that it was an Xray hazzard,
>>> and in and of itself had become radioactive from long operation
>> As has been said here before, it is NOT possible to make things
>> become radioactive from shooting x-rays at them.
> 
> That's not what's claimed.
> 
> What's claimed is that shooting electrons at the screen fast enough
> both (a) generated X-rays, and (b) rendered that screen radioactive.
> This has nothing to do with whether X-rays can make what they hit
> radioactive.

Anyway, if an electron beam can cause something to be radioactive, then 
X-rays can too, by using the photoelectric effect to generate an 
electron beam within the material, no?

Peace...  Sridhar