Diffraction laboratory

The last lab exercise will be held next week, and as before, please go to the doodle at http://doodle.com/n5nmc7yyw8debwib and sign up for the date and time that fits you.

I'll limit the groups to four members this time, since we ended up with a rather small group of only two last time, and we should probably manage with only two groups total if people can attend at the same dates.

The lab-text can be found here, as usual - read it beforehand. Also as usual, send me an email if there are any issues.

Ainar