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OPOD - Rainbow Colours 30 Jun 2013 | 09:56 pm
A simulated rainbow for drops 0.7mm diameter. The final bow is the sum of contributions from all wavelengths - thousands in the Airy theory calculation that generated it rather than the 13 shown h...
OPOD - Classical Green Flash 26 Jun 2013 | 02:58 pm
Green flashes come in different flavours. Mock mirage flashes flicker on distorted layered suns still partially above the horizon but they are rarely visible to the unaided eye and it is dangerous to ...
OPOD - Soap Film Colours 23 Jun 2013 | 02:36 pm
Black! Not a hole but a sign that the end is near. The film or bubble will soon collapse. Gravity has caused the vertical film to drain downwards and become thinner at the top. The black indicates t...
OPOD - Iridescence, Raven, Wigan 20 Jun 2013 | 11:51 pm
OpticsPOD - Optics Picture of the Day - OPOD | Today - Galleries - Submit Image - Atmospheric Optics About - Submit Optics Picture of the Day Galleries Previous N...
OPOD - Twin Sisters Range Circumhorizon Arc 18 Jun 2013 | 09:36 pm
Twin Sisters Range Circumhorizon Arc - John Scurlock ( Mountain Aerial Photography ) pictured the scene while he was flying near the Twin Sisters Range east of Bellingham, Washington. The camera looks...
OPOD - Sugar Mountain Glories 15 Jun 2013 | 09:00 pm
Sun shining on mist, and a downward looking viewpoint in the direction opposite the sun – the ingredients for a glory. Very small (1 to 100 micron diameter) droplets in the mist diffract and scatter ...
OPOD -Water Aureole, Cardiff, Wales 11 Jun 2013 | 09:36 pm
A smoothly rounded wave forms a region of space below it where refracted sun rays cross. They cluster at its edges to form bright sheets of light. The sheets join in a cusp at their top and spread ap...
OPOD - Sirius & Atmospheric Seeing 11 Jun 2013 | 09:35 pm
"I have a long running relationship with Sirius as I have been trying to photograph the elusive Sirius B for at least 3 years, not very successfully until now. At a maximum altitude of less than 14° ...
OPOD - Pine Pollen Corona 2 Jun 2013 | 03:32 pm
Many rings, oval rings, bright spots. All a direct consequence of the corona's source - pollen grains. Many rings? With luck - as here - the grains come from a particular type of tree. They are ...
OPOD - Fogbow, Indonesia 2 Jun 2013 | 03:32 pm
Corona from the same droplets IRIS Mie simulation of a glory and fogbow from droplets with a mean diameter of 32 micron but a wide spread of sizes. The glory and fogbow are thereby smeared out and s...
