> > > Give the guy a break. Give him the space to learn each step of the way. > You don't start explaining calculus to someone just learning to add > either. > That will only snow them and turn them off and maybe never come back. Ok, for now it's enough that he knows that there ARE such effects, and that they can be important. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist