# 1. Find the probability of isotropic scattering into a differential solid angle is d?/4pr 2 where…

1. Find the probability of isotropic scattering into a

differential solid angle is d_/4_r2 where the

differential solid angle d_ is given as 2_rsin(_COM)(rd_COM).

[Hint: Integrate over _ to get scattering in the segment]

2. Show that scattering in the COM system is isotropic. For

this purpose, find cos (_ COM) and interpret the result. [Hint:

Multiply the cosine of the scattering angle in the COM by the probability of

scattering and integrate from 0 to _].