Deathwing
Hi I was wondering if there is any crystal, element or substance which visibly changes in the presence of radiation, either changing colour or giving some other visible indication?
The quicker it changes to give an indication the better. I'm sure there must be a few things but I can't think of anything!
Thanks :)
The quicker it changes to give an indication the better. I'm sure there must be a few things but I can't think of anything!
Thanks :)
