| September 2022: Reflexes on a spider web |
| March 2022: Melting ice |
| February 2022: Very strange interference colours on ice, revised |
| October 2021: Iridescent earthworm. Extended January 2022 |
| September 2021: Diffraction and interference at a misted window pane |
| April 2021: Fluorescent bananas |
| November 2020: Rainbow colours |
| May 2020: Troxler fading, afterimages |
| April 2020: Birefringence and Polarisation, Complementary Colours |
| March 2020: Fly eye diffraction pattern |
| March 2020: The negative |
| January 2020: Panorama with Moon |
| December 2019: Afterglow, Sky colours |
| November 2019: Frost patterns |
| November 2019: Reed |
| June 2019: Noctilucent clouds (extended July 2019) |
| March 2019: Mirrored ice |
| March 2019: Rays and clouds |
| December 2018: Curved light rays |
| November 2018: A glass door prism |
| September 2018: Light patterns |
| August 2018: Real Yellow |
| August 2018: Iridescent weathered glass |
| August 2018: Gleaming sky – zero order glow |
| July 2018: Colourful reflections in a spider's sheet-web |
| June 2018: Iridescent butterfly wings |
| May 2018: Very strange interference colours on ice |
| March 2018: Fresnel diffraction |
| March 2018: The Poisson spot |
| January 2018: Unexpected stripes – elliptic polarisation |
| December 2017: Goethe's black and white crosses |
| November 2017: Colourful Black II: Iridescent Vinyl |
| November 2017: Colourful Black |
| October 2017: Quetelet rings |
| September 2017: Glistening spider silk |
| August 2017: Dewed windowpane aureole II |
| June 2017: Curtain diffraction |
| February 2017: Polar lights once more |
| January 2017: Coloured reflection |
| December 2016: Sunlit hot tea |
| November 2016: Munker's illusion applied |
| October 2016: Spiderweb against the sun |
| September 2016: Road mirages |
| September 2016: Light rings and diffraction from thistle-seed pappus |
| August 2016: CD-R diffraction |
| July 2016: Sun pillars and glitter paths |
| June 2016: Glory around vanished shadow |
| May 2016: Single-drop rainbow and supernumerary colours |
| April 2016: Droplets, bokeh and diffraction |
| March 2016: Corona discharges, artificial St Elmo's fire |
| February 2016: Kelvin wakes |
| February 2016: Polar lights |
| December 2015: A circumzenithal arc |
| December 2015: Reflections |
| November 2015: Light rings |
| October 2015: Frying pan optics |
| September 2015: Behind the rainbow |
| September 2015: Stars by diffraction |
| August 2015: Glasses for 3d-films |
| July 2015: Dragonflies' eyes |
| June 2015: Ermine moths' web tents |
| June 2015: Strange colours in a foil-greenhouse |
| April 2015: Turbid water aureole |
| April 2015: Puddles and iridescent clouds |
| March 2015: Bluish smoke with reddish shadow |
| February 2015: Lunar corona |
| January 2015: Smooth ice with large monocrystals |
| January 2015: Glory and Brocken Spectre |
| December 2014: Peculiar window frost |
| November 2014: Dewed windowpane aureole |
| October 2014: Dewbow reflexes and Fresnel diffraction |
| September 2014: Sunlit star effect foil |
| September 2014: A huge moiré |
| August 2014: Light-interference pigments |
| June 2014: Split rainbow |
| April 2014: Greenish and reddish iridescence of meat |
| March 2014: Iridescent glass bottles |
| January 2014: Star effect foil |
| December 2013: Traffic signs – retroreflective foils |
| September 2013: Waves and caustics |
| July 2013: Interference on double-glazed window panes |
| April 2013: Quételet rings or fringes |
| March 2013: Acrylic glass as a diffraction grating |
| Diffraction by feathers |
| An irregular reflection grating |
| Calcite |
Legal Information Data Privacy