Copied on 22 Jan 14 from
https://xkcd.com/radiation

This figure has been modified to remove volatile sources disallowed as references in PH241. Below is the Creative Commons release of copyright holder Randall Monroe.




CC0

I waive all copyright to this chart and place it in the public domain, so you are free to reuse it anywhere with no permission necessary. (However, keep in mind that I am not a radiation expert, and this chart is intended for general public informational use only.)