Art and science lighted create the tour with the knowledge kingdom
Use the ABC to help to maximize the influence of your next lighting project and succeed. So, no matter you are a new hand to the illumination or only like upgrading one's own memory, your journey will begin from here.
Only a kind of electromagnetic radiation
The visible light makes up a part of the so-called electromagnetic spectrum, the electromagnetic spectrum exists in the radio and TV signal, including infrared and purple other radiation, x ray, nuclear radiation and universe radiation. In the electromagnetic radiation, only the light wave is that animal and human eye can see. This spectrum includes 50 hertzs of standard alternating current (wavelength is 6000 kilometers ) and wavelength of 380-780 nanometers too (=10-9Some of visible light that rice ). Different wavelength cause to human eye different color feel from red orange yellow green blue getting indigo to purple
Electromagnetic radiation table . The visible light area shows that enlarges
much more on the right
Mere spread
As the light reaches a surface, among them a part is reflected, a part is absorbed, some transmission goes over. It can be as smooth as mirror to reflect the surface , or will enter the scattering of shooting out like surface painting . Absorb the light and is usually transformed into heat. Part reflected or absorbing does not see through the surface. Design and use the way in which the above light travels to create the result wanted to get in light source and optics of the lamps and lanterns.
Reflect, absorbing and transmission
Human eye
The human eye is roughly a spheroid of 25 mm. in diameter. The localization skin of eyes makes their rotate in any direction. Say eyes just like equip with camera of lens , it to the surface after sensitization inverted image transmission that dwindle of the object at a distance plain, called the retina.
From the right eye section that is seen above
Within can seeing the range, the strong change with change of the wavelength of susceptibility of eyes. For example (photopic vision) under good lighting condition very, eyes 20 times of red light or blue light to smooth (yellow light ) sensitive degree, 550nm of wavelength. The peak value of the susceptibility drops to 50nm, approach the blue mere one end of the spectrum under the low lighting level (sootopic vision).
Photopic vision V (lamda) with is it feel standard spectrum human eye
susceptibility curve of V' (lamda ) to suggest, according to international
lighting association standard.
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