Radiation Detector and App for iPhone and iPod touch

There you are walking down the street minding your own business when you receive a text message from your local emergency management agency tell you that there has been a radiation leak and cloud of radioactivity is headed your way.  You are instructed to "shelter in place."

 

So you duck into the nearest building, say hello to the receptionist causing all sorts of anxiety when you inform her or him that they are about to glow in the dark.  At which point, noting that you have erred in providing too much graphic information you reach into your bag of tricks and pull out youriPhone radiation detector. 

 

Now feeling somewhat smug that you have such a device, along with twenty other attachments for the iPhone, you commence to scan for any radiation.  The readings come up "Green" indicating a safe Gamma Radiation free environment, so you stick your arm out the door to check outside too.  All clear, you administer first aid to the receptionist who is passed out on the floor giving her/him the good news that they will not turn into a light stick anytime soon.

 

Feeling fully confident that the environment is safe you disconnect the device and go out on your merry way.  Which is to the chiropractor to get an adjustment for your back because you carry so much gear with you at all times.

 

While walking down the street in the cool breeze of a late summer day your mind starts thinking about, "Just how do they calibrate those radiation detection devices?"