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Unlike a camera, flies and other animals can tune their eyes to the light levels of different regions of an image independently. In nature, the individual cells of the eye adjust to a part of the image independently in order to capture the maximum amount of information about the scene. By comparison, an ordinary camera measures the average brightness of a scene (or part of it), and then decides on a single setting for the whole frame. So...

2006-08-30

 film light technology
A subtle force from sunlight that changes the spin rate of space rocks has been measured directly for the first time.

2007-03-07

 asteroid light pressure
Three scientists who corralled light to transform our communications systems share this year's physics Nobel Prize...

2009-10-06

 Nobel prize light physics toread
A bid has been submitted to see a south of Scotland forest recognised as the first "dark sky park" outside the US...

2009-10-16

 starry sky light pollution astronomy
Energy-efficient light bulbs lose on average 22% of their brightness over their lifetime, a study has found.
 bulb light environment toread
The traditional incandescent bulb is on the way out. European law means people will be encouraged to use longer-lasting, energy-efficient lights instead. But many remain unconvinced that the common alternative - compact fluorescent lamps (CFLs) - are up to the job.

2009-12-11

 bulb light energy
The trick is to change the speed and direction in which light travels through the material - that is, to change the material's refractive index...

2010-03-18

 3D Invisibility light vision slow light
The 50th anniversary of the first demonstration of a ruby laser at the Hughes Research Labs in the US.

2010-05-12

 laser history technology science light
I'm angry that we are no longer able to enjoy a dark garden or clearly see the night sky. It's like having to inhale a smoker's cigarette smoke...

2010-04-15

 pollution night sky astronomy star darkness light
It is the picture that confirms Japan's Ikaros solar sail is fully extended and ready for the next part of its mission. ... The project team will be particularly concerned to keep the sail fully extended and flat. Rather than employ rigid booms or ribs to do this, Ikaros simply spins, making one or two revolutions per minute...

2010-06-16

 sail solar light photon space travel Ikaros
Protons, among the building blocks of atoms, are even smaller than we thought—and the unexpected discovery may alter some of the most trusted laws of physics.

2010-07-07

 physics proton size light cosmology
Plants are able to "remember" and "react" to information contained in light, according to researchers. Plants, scientists say, transmit information about light intensity and quality from leaf to leaf in a very similar way to our own nervous systems. These "electro-chemical signals" are carried by cells that act as "nerves" of the plants...

2010-07-14

 memory communication thinking plant intelligence cognition light electricity chemistry signal nervous system colour

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