View allAll Photos Tagged light
Man, when circuits get extra small, they get extra cute.
Once a 3V coin battery is attached the blue LED will light up in the dark. This one's gonna be an earring.
Amazing beams of sun light shoots through the waters at the coral reef in Sharm El Sheik, Egypt. Could stay down there for a long time...
Camera: Canon IXUS 80 IS
F: 8
Shutter: 1/1250
Iso: 80
Place: Egypt, Sharm El Sheikh
Editing: Minor adjustments of levels
At:11:18, Jan 5, 2010
Please, no graphics in the comments... :-)
Jeep PSU410 is pictured at the Military Vehicle Rally at the Durham Light Infantry Museum, Durham, on August 30th 2009.
Late afternoon light in Marske Church near Richmond in North Yorkshire. Just loved the light through the window!
The BNSF Gold Bar Turn continuing south through Edmonds. It was heading to Richmond Beach to pick up some chemical cars.
April 30, 2016
A Red Tailed Hawk (I think) has a perfect perch for taking in the Nauset vs. Hingham baseball game below. A season ticket holder, I'm sure.
Eldredge Field
Orleans, Massachusetts
Cape Cod - USA
Photo by brucetopher
© Bruce Christopher 2016
All Rights Reserved
No use without permission.
Please email for usage info.
I found another abandoned house and shot it for a while. I then noticed this poor tree and decided it would be a fun subject to light paint. Exposure f/11@ 145sec
Another photo here
To me this feels like a Dean Chamberlain influenced LP!
Whenever I turn on this little lamp, which mind you, has been totally ruined by Lionel eating it (lucky it's only a cheap crappy one from Ikea!), he warms himself up from the light, and I thought it was about time I got a photo of him doing this!
The iridescent colours of soap bubbles are caused by interfering light waves and are determined by the thickness of the film. This phenomenon is not the same as the origin of rainbow colours, but rather are the same as the phenomenon causing the colours in an oil slick on a wet road.
As light impinges on the film
1.some of it reflects off of the outer surface
2.some of it enters the film and reemerges after reflecting off the second surface
3.some of it enters the film and reemerges after bouncing back and forth between the two surfaces once
4.some of it enters the film and reemerges after bouncing back and forth between the two surfaces twice
5.some of it enters the film and reemerges after bouncing back and forth between the two surfaces every number of times you can think of.
The total reflection observed is determined by the interference of all these reflections. Since each traversal of the film causes a phase shift proportional to the thickness of the film and inversely proportional to the wavelength, the result of the interference depends on these two quantities. So at a given thickness, interference is constructive for some wavelengths and destructive for others, so that white light impinging on the film is reflected with a hue that changes with thickness.
A change in colour can be observed while the bubble is thinning due to evaporation and draining. Thicker walls cancel out red (longer) wavelengths, causing a blue-green reflection. Later, thinner walls will cancel out yellow (leaving blue light), then green (leaving magenta), then blue (leaving a golden yellow). Finally, when the bubble's wall becomes much thinner than the wavelength of visible light, all the waves in the visible region cancel each other out and no reflection is visible at all. When this state is observed, the wall is thinner than about 25 nanometers, and is probably about to pop. This phenomenon is very useful when making or manipulating bubbles as it gives an indication of the bubble's fragility.
Interference effects also depend upon the angle at which the light strikes the film, an effect called iridescence. So, even if the wall of the bubble were of uniform thickness, one would still see variations of colour due to curvature and/or movement. However, the thickness of the wall is continuously changing as gravity pulls the liquid downwards, so bands of colours that move downwards are usually observed.
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