# Question: a photon produced in the centre of the sun travels...

###### Question details

A photon produced in the centre of the sun, travels about 1 cm
between collisions and there are 10^8 collisions per sec.

a) What is the average distance travelled in any direction between
steps?

b) What is the standard deviation about this value?

c) The radius of the Sun is 7x10^8 m. How many steps must a
photon take before having a 32% chance of being outside the
Sun?

d) How many years does the number of steps in “c” correspond
to?