Relative Radiation Doses — XKCD

Here’s a chart that shows the rel­a­tive dos­es of radi­a­tion and the lev­els of exter­nal dose that is fatal. Thanks to XKCD for this great illus­tra­tion!

XKCD's Chart showing relative radiation doses

Author: Doug Nix

Doug Nix is Managing Director and Principal Consultant at Compliance InSight Consulting, Inc. ( in Kitchener, Ontario, and is Lead Author and Senior Editor of the Machinery Safety 101 blog. Doug's work includes teaching machinery risk assessment techniques privately and through Conestoga College Institute of Technology and Advanced Learning in Kitchener, Ontario, as well as providing technical services and training programs to clients related to risk assessment, industrial machinery safety, safety-related control system integration and reliability, laser safety and regulatory conformity. For more see Doug's LinkedIn profile.