Homework 6
Due: not to be turned in (suggested problems)
32. For a random walk with fixed mean free path l, a photon will
diffuse a distance R after N steps are taken,
where N is given by
N = (R/l)2. Using the unlikely guess that the photon
mean free path in the Sun is constant and of size l = 1 cm, estimate
the time it takes photons to diffuse from the core of the Sun (where the
nuclear reactions occur) to the surface of the Sun.
33. 15.1
34. 15.8
35. 15.12
36. 15.13
37. 16.5
38. 16.8