It's a x-ray tube and a x-ray sensor + analysis. It's bad radiations (like in lu...

GistNoesis on April 1, 2022 | parent | context | favorite | on: High schoolers create filter to remove lead in wat...

It's a x-ray tube and a x-ray sensor + analysis. It's bad radiations (like in luggage detector or dentist machine) but when you turn-off the device they stop, whereas radioactive don't stop.