Hi all,(adsbygoogle = window.adsbygoogle || []).push({});

Edit: Here's the question, in case you guys don't have the book:

In the Drude moel the probability of the electron suffering a collision in any infinintesimal interval dt is just dt/T.

a) show that an electron picked at random at a given moment had no collision during the preceding t seconds with the probability exp[-t/T]. Show that it will have no collision during the next t seconds with the same probability.

I'm trying to figure out how to get the exp[-t/T] part, 'cause nowhere in the chapter does it show a probability as XX exp[-t/T].

Please just help me get started. Any reference equations would be good...

Thanks!

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Solid State Physics [Ashcroft] Chapter 1, Question 1a!

**Physics Forums | Science Articles, Homework Help, Discussion**