The impact of radiation dosage – scaled…………………Credit: xkcd.com (public domain)

In case you haven’t seen this somewhere else:

The brilliant (if obscurely warped) mind of xkcd has strayed from the comic realm into the realm of information display – with remarkable results.

Go to the source, check it out, enlarge the original, print: Paste it to the physics/biology/chemistry lab door.

Radiation chart at xkcd.com