Diffraction lab-report feedback and CCD Lab-Report Info!

Hi,

Firstly, those of you who haven't received your lab-report feedback (at the lecture or group session today), I'm hanging onto them, and you can get them from my post-box down the hallway from my office (or by swinging by my office - send me a mail).

Secondly, regarding the first part of the CCD-lab regarding chromatic aberration, where most groups got no usable images (Thanks to my total loss of memory regarding where the nominal focus was! - Which I discovered with the last group of course...), I want to clarify what is necessary to include.

A not too long mention of the danger of chromatic aberration and how it *would* appear (different focus points for different wavelengths), and the possible consequence when using a color CCD (importance of placement in the correct focus point for the wavelength of interest etc.) is enough. A mention of the setup and how it was attempted to be demonstrated should also be included.  

Cheers,

Ainar