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0n the other hand, when the reaction was conducted under visible radiation, the Ti[(OH).sub.4] was much more active than the other catalysts, which was expected since it has a higher absorption in the visible region compared to the other catalysts (Figure 7(b)).
Visible radiation is often ideal for observing hurricanes, clouds or, under clear conditions, many phenomena at the earth's surface.
A solar-blind photo-detector has high sensitivity to ultraviolet radiation, but no appreciable response to visible radiation. These devices are important tools in many scientific and industrial applications in which one wants to measure ultraviolet light in the presence of high intensity visible light; for example, observing solar ultraviolet intensity in environmental monitoring systems, and measuring the wafer plane dose in deep ultraviolet lithography processes.
In order, the bands of the electromagnetic spectrum consist of gamma rays, X rays, ultraviolet radiation, visible radiation, infrared radiation, microwaves, and radio waves, with divisions being somewhat arbitrarily assigned.
The Council Recommendation, if adopted by EU Health Ministers, will set out a basic EU standard for restrictions and reference levels on non-ionising radiation - such as ultra-violet and visible radiation - from a range of everyday equipment, which may result in electric shocks, skin burns, or impact on the cardiovascular and central nervous system.
An indication of the powerful influence of mm-wave radiation in penetrating fog may be seen by comparing the values of the extinction coefficient at some specified wavelength and fog state with that for visible radiation. The approach has been outlined previously.[8] For example, taking a fairly severe fog condition, CAT II advection fog at the lower limit of visibility and at a temperature of 20 [degrees] K and considering 35 GHz radiation, the extinction coefficient is 0.044 (1/km) due to the saturated atmosphere and 0.005 (1/km) due to the condensed fog droplets.