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Re: [Phys-l] XKCD.com



OOPS SMALLER not larger. Sorry for this typing error (corrected below).


On Mar 22, 2011, at 12:39 AM, ludwik kowalski wrote:

Seviert (and rem) are said to be units of "absorbed dose" of radiation. I think that the term "absorbed dose density" would be more appropriate. Do you agree? It is energy absorbed per kilogram of tissue, multiplied by a dimensionless factor, called relative effectiveness. The term dose should be used for the product of Sv by the mass of the affected tissue, in kilograms.

A wide flux of hard X-rays, for example, would deposit a SMALLER dose in one finger than in the entire hand. The SI unit of dose would be Joule, not J/kg (as it is now). For gamma rays and X-rays, the relative effectiveness factor is 1, by definition.

Ludwik
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On Mar 20, 2011, at 10:00 PM, chuck britton wrote:

http://xkcd.com/radiation/

(Not just for Sex & Satire anymore ;-) )
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Ludwik

http://csam.montclair.edu/~kowalski/life/intro.html




_______________________________________________
Forum for Physics Educators
Phys-l@carnot.physics.buffalo.edu
https://carnot.physics.buffalo.edu/mailman/listinfo/phys-l

Ludwik

http://csam.montclair.edu/~kowalski/life/intro.html