When stimulated by electric current, mercury vapor inside a CFL produces ultraviolet light, which is re-radiated as visible light when it strikes the fluorescent compound, known as phosphor, painted on the inside of the bulb. No other element has proved as efficient in this process, so even ...
What you cannot see is the ultraviolet light that the bulb is also producing. Our eyes can see visible light in a spectrum ranging from red through orange, yellow, green, blue and violet. Above violet is ultraviolet light, which we cannot see. How Sunburns and Sun Tans Work discusses ...
Ultraviolet (UV) light is one form of electromagnetic energy produced naturally by the sun. UV is a spec- trum of light just below the visible light and it is split into four distinct spectral areas-Vacuum UV (100 to 200 nm), UVC (200 to 280 nm), UVB (280 to 315 nm) and UVA (...
Ultraviolet (UV) radiation is a ubiquitous component of the environment that has important effects on a wide range of cell functions. Short-wavelength UVB radiation induces sunburn and is a potent immunomodulator, yet longer-wavelength, lower-energy UVA radiation also has effects on mammalian immunity...
Exposure to the ultraviolet laser light cures and solidifies the pattern traced on the resin and fuses it to the layer below.After the pattern has been traced, the SLA’s elevator platform descends by a distance equal to the thickness of a single layer, typically 0.05 mm to 0.15 mm (...
When exposed to ultraviolet light, photoresist undergoes a chemical change, which allows a developer solution to remove exposed photoresist and leave an unexposed portion on the wafer. For each mask required by the circuit, the photolithography/photoresist process is repeated....
And to make it more confusing, older studies on the effects of blue and violet light aren’t as valid. A lot of the time the lights used in the studies also produced UV, so it’s possible that the effects they found were from the contaminating UV rays and not the visible light at ...
In marine organisms, the blue light produced by bioluminescence is most helpful because the wavelength of the light, around 470 nanometers, transmits much farther in water. Also, most organisms don't have pigments in their visual organs that enable them to see longer (yellow, red) or shorter...
The advantage of this system is that you can catalyze very small quantities of propane over a long period of time without having to worry about the flame ever going out. In addition, there are no worries about other gases, like carbon monoxide or nitrogen oxides, being produced by the ...
The light box is then switched on, and ultraviolet light develops the image of the pages onto the aluminum plate. The aluminum plate is then bent at the edges so that it will fit into a press, and is fitted onto plate cylinders.