Question

1. Derive compound X,mY s cross section.

Answer 1

For the compounds of the type cross section simply adds up as given,

min

O mor no,

Where $\sigma$ are the microscopic cross sections

And similarly for macroscopic cross section we write,

$\sum=\sum_{\,\,\,\,\,\,\,\,\,\,\,\,x}+\sum_{\,\,\,\,\,\,\,\,\,\,\,\,y}=N_x\sigma_x+N_y\sigma_y$

Where,

N mN NynN V.

So this equation becomes,

mNonNoy N (ma noy) = No

Which is the answer

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