![click!](../bildchen/tn-P1110912.jpg) | September 2022: Reflexes on a spider web |
![click!](../bilder/tn6553U.jpg) | March 2022: Melting ice |
![click!](../bilder/tn_clip3.jpg) | February 2022: Very strange interference colours on ice, revised |
![click!](../bilder/tnCIMG5197w.jpg) | October 2021: Iridescent earthworm. Extended January 2022 |
![click!](../figuren/tn-sept21.jpg) | September 2021: Diffraction and interference at a misted window pane |
![click!](../bilder/tnP1110130.jpg) | April 2021: Fluorescent bananas |
![klick!](../bilder/tn_RB.jpg) | November 2020: Rainbow colours |
![click!](../bilder/tn-P1100209plus.jpg) | May 2020: Troxler fading, afterimages |
![click!](../bilder/tnP1100209.jpg) | April 2020: Birefringence and Polarisation, Complementary Colours |
![click!](../bilder/tn-flyeye.jpg) | March 2020: Fly eye diffraction pattern |
![click!](../bilder/tnP1100093.jpg) | March 2020: The negative |
![click!](../bilder/tnP1100012crw.jpg) | January 2020: Panorama with Moon |
![click!](../bilder/tn2152.jpg) | December 2019: Afterglow, Sky colours |
![click!](../bilder/tnP1090765.jpg) | November 2019: Frost patterns |
![click!](../bilder/tnP1060287.jpg) | November 2019: Reed |
![click!](../bilder/tnP1090434.jpg) | June 2019: Noctilucent clouds (extended July 2019) |
![click!](../bilder/tnicereflex2.jpg) | March 2019: Mirrored ice |
![klick!](../bilder/tnDSC01129.jpg) | March 2019: Rays and clouds |
![click!](../figuren/tnWindR.jpg) | December 2018: Curved light rays |
![click!](../bilder/tnFoto0210.jpg) | November 2018: A glass door prism |
![click!](../bilder/tn6.y0H8000.jpg) | September 2018: Light patterns |
![click!](../bilder/tnP1080544.jpg) | August 2018: Real Yellow |
![click!](../bilder/tnP1080493.jpg) | August 2018: Iridescent weathered glass |
![click!](../bilder/tnP1080227.jpg) | August 2018: Gleaming sky – zero order glow |
![click!](../bilder/tn3P1070905d1.jpg) | July 2018: Colourful reflections in a spider's sheet-web |
![click!](../bilder/tnDSC09293.jpg) | June 2018: Iridescent butterfly wings |
![click!](../bilder/tn_clip3.jpg) | May 2018: Very strange interference colours on ice |
![click!](../figuren/tnFr-0.225-1.5.jpg) | March 2018: Fresnel diffraction |
![click!](../bilder/tnP1070084.jpg) | March 2018: The Poisson spot |
![click!](../bilder/tnP1060871.jpg) | January 2018: Unexpected stripes – elliptic polarisation |
![click!](../bilder/tnP1060606.jpg) | December 2017: Goethe's black and white crosses |
![click!](../bilder/tnP1060438.jpg) | November 2017: Colourful Black II: Iridescent Vinyl |
![click!](../bilder/tnP1060338.jpg) | November 2017: Colourful Black |
![click!](../bilder/tnP1060021.jpg) | October 2017: Quetelet rings |
![click!](../bilder/tnP1040880p10.jpg) | September 2017: Glistening spider silk |
![click!](../bilder/tnqDSC08908.jpg) | August 2017: Dewed windowpane aureole II |
![click!](../bilder/tnP1030559.jpg) | June 2017: Curtain diffraction |
![click!](../bilder/tnP1020803_2p5.jpg) | February 2017: Polar lights once more |
![click!](../bilder/tnP1020681.jpg) | January 2017: Coloured reflection |
![click!](../bilder/tnP1020260.jpg) | December 2016: Sunlit hot tea |
![click!](../bilder/tnP1020229.jpg) | November 2016: Munker's illusion applied |
![click!](../bilder/tnP1010972.jpg) | October 2016: Spiderweb against the sun |
![click!](../bilder/tnDSC03015.jpg) | September 2016: Road mirages |
![click!](../bilder/tnP1010851.jpg) | September 2016: Light rings and diffraction from thistle-seed pappus |
![click!](../bilder/tnP1010692.jpg) | August 2016: CD-R diffraction |
![click!](../figuren/tnSieb0.5.png) | July 2016: Sun pillars and glitter paths |
![click!](../bilder/tnP1000964.jpg) | June 2016: Glory around vanished shadow |
![click!](../bilder/tnFoto0118.jpg) | May 2016: Single-drop rainbow and supernumerary colours |
![click!](../bilder/tnDroplets.jpg) | April 2016: Droplets, bokeh and diffraction |
![click!](../bilder/tnP1000369.jpg) | March 2016: Corona discharges, artificial St Elmo's fire |
![click!](../bilder/tnDSC02547.jpg) | February 2016: Kelvin wakes |
![click!](../bilder/tnP1000163.jpg) | February 2016: Polar lights |
![click!](../bilder/tnDSC02454.jpg) | December 2015: A circumzenithal arc |
![click!](../bilder/tnDSC02025l.jpg) | December 2015: Reflections |
![click!](../bilder/TN01806.JPG) | November 2015: Light rings |
![click!](../bilder/tnDSC01515.jpg) | October 2015: Frying pan optics |
![click!](../bilder/Sept2015-3.jpg) | September 2015: Behind the rainbow |
![click!](../bilder/TnSept15.jpg) | September 2015: Stars by diffraction |
![click!](../Lab4/tnDSC05001.jpg) | August 2015: Glasses for 3d-films |
![click!](../figuren/tn100-2000.png) | July 2015: Dragonflies' eyes |
![click!](../Lab4/tnDSC00898.jpg) | June 2015: Ermine moths' web tents |
![click!](../bilder/tnBild0257.jpg) | June 2015: Strange colours in a foil-greenhouse |
![click!](../Lab4/tnDSC09845b.jpg) | April 2015: Turbid water aureole |
![click!](../bilder/tnDSC09598.jpg) | April 2015: Puddles and iridescent clouds |
![click!](../bilder/TNsmoke.jpg) | March 2015: Bluish smoke with reddish shadow |
![click!](../bilder/tnDSC09097.jpg) | February 2015: Lunar corona |
![click!](../Lab4/tnIMG0016.jpg) | January 2015: Smooth ice with large monocrystals |
![click!](../bilder/tnDSC00196.jpg) | January 2015: Glory and Brocken Spectre |
![click!](../bilder/tnDSC14468.jpg) | December 2014: Peculiar window frost |
![click!](../Lab4/tnDSC08320.jpg) | November 2014: Dewed windowpane aureole |
![click!](../Lab4/tnDSC07691.jpg) | October 2014: Dewbow reflexes and Fresnel diffraction |
![click!](../Lab4/tnDSC06991.jpg) | September 2014: Sunlit star effect foil |
![click!](../Lab4/tnDSC06318.jpg) | September 2014: A huge moiré |
![click!](../Lab4/tnDSC06271.jpg) | August 2014: Light-interference pigments |
![click!](../Lab4/tnFOTO250A.jpg) | June 2014: Split rainbow |
![click!](../Lab4/tnDSC05683.jpg) | April 2014: Greenish and reddish iridescence of meat |
![gutturnium](../bilder/DSD09902.jpg) | March 2014: Iridescent glass bottles |
![Sternfolie](../Lab4/tnDSC29798.jpg) | January 2014: Star effect foil |
![Verkehrszeichen](../bilder/tnDSC08513.jpg) | December 2013: Traffic signs – retroreflective foils |
![click!](../Lab4/tnDSC20288.jpg) | September 2013: Waves and caustics |
![click!](../Lab4/DSC08174-detail.jpg) | July 2013: Interference on double-glazed window panes |
![click!](../bildchen/tnPQ1555.jpg) | April 2013: Quételet rings or fringes |
![click!](../Lab4/tnDSC15159.jpg) | March 2013: Acrylic glass as a diffraction grating |
![click!](../Lab4/tnDSC07742.jpg) | Diffraction by feathers |
![click!](../Lab4/tnDSC04064.jpg) | An irregular reflection grating |
![click!](../bilder/tnDSC20074.jpg) | Calcite |