From key@physics.utoronto.ca Wed Apr  2 19:52:40 2008
Date: Wed, 02 Apr 2008 19:52:39 -0400
From: Tony Key <key@physics.utoronto.ca>
To: taha.othman@utoronto.ca
Subject: Re: question for mastering physics

Hi Taha - in SNIV you'll find the derivation -

Thus Dm(x) = (&#916;E/ m) = (µen &#936;(x) S dx / &#961; S dx) =
(µen/&#961;)m &#936;(x).

Sorry if an error in the journal notes confused you.  Thanks for 
pointing it out.

TonyK


taha.othman@utoronto.ca wrote:
      Hi Professor,
          In the journal notes of lecture 11 you wrote
      Dose at entry to body D_body= (energy fluence)/(mass
      energy coefficient of body).

      In the solutions to mastering physics PS-6 "Dose from a
      radioactive source" PART C,    D_body = (mass energy
      coefficient of body) multiplied by (energy fluence),
      rather than dividing as suggested in the notes.

      Which one is right?
      Thank you,
                                                     Taha O.