After Prof. Inglesfield's talk on Wednesday I was very eager to look into the optical effects he described in detail. He sent me a link to: http://www.philiplaven.com/. This is a good site. Full of lovely pictures and also lots of physical / mathematical descriptions. Most of this is not for the non-scientific. His descriptions are quite good though, just ignore some of the diagrams! It is worth a look just to see some of the stunning photographs.
