Posts Tagged ‘optics’

light-show

Physicists resolved the centuries-old debate on the nature of light by declaring that it is both a wave and a particle, but for most practical purposes, they treat it as a wave. The distance between wave peaks in a light beam is known as the wavelength, and the total range of possible wavelengths is known as the electromagnetic spectrum. The human eye processes visual information by perceiving only a small fraction of the spectrum. sciencing.com My light photograph is titled “Light Show” .

 

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In optics, a caustic or caustic network is the envelope of light rays reflected or refracted by a curved surface or object, or the projection of that envelope of rays on another surface. The caustic is a curve or surface to which each of the light rays is tangent, defining a boundary of an envelope of rays as a curve of concentrated light. A common situation where caustics are visible is when light shines on a drinking glass. The glass casts a shadow, but also produces a curved region of bright light. I’ve been taking photographs of light, shadow and caustic optics for many years.This is a photo that I took in 2012 ,which was before I knew the name caustic.

 

 

DCF 1.0

I began the Journal of Seeing blog on October 19,2010 with a photograph of my older brother Ronald and I sitting outside on the steps of our house. I was about five years old. I have decided to repost some of the images I have posted during the last seven years. They are photographs I have taken and art I have created. This photo was taken about 2004 with my first digital camera, a Minolta Damage 5414. The morning sun was casting shadows of a vase , bottle and drink glass. The reflection-refraction of the sun passing through the glass caught my eye. The title I gave to this image is “Morning Sun”.

red-gasses-and-it's-shadow,Dec

I took a series of photographs several years ago of eye glasses and sun glasses with their shadow,taken from above.I’m sure this has been done by other photographers but it was new for me and not based on any photos I had seen before.

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I took a series of photographs several years ago of eye glasses and sun glasses with their shadow,taken from above.I’m sure this has been done by other photographers but it was new for me and not based on any photos I had seen before.
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Wall Flower- photograph by John Dyess

An illustrator friend, Jean Probert, commented on yesterday’s post and advised me that the image I called reflection was in fact, in optics,a caustic or caustic network. Here is another caustic network photo. It was taken in my bedroom in late afternoon.