The potential for light to perform work is called light energy. Light energy is the only form of energy that we can actually see directly. It is formed through chemical, radiation, and mechanical means. Light energy can also be converted into other fo
Light pollution is also harmful to humans.D. Light pollution has many bad consequences.E. What else can we do to prevent light pollution?F. Besides, light pollution contributes to energy waste.G. There are three main types of light pollution including glare,light trespass and skyglow.1.2.3.4...
Green photonics is presently thought to be a major sunrise direction of R+D with huge impact in particular on communication systems, like workstation clusters or supercomputers. Their energy consumption is now approaching or already surmounting 500 MW for new installations. Most of their energy is ...
The LED or IRED has a transparent package, allowing(9)or IR energy to pass through. Also, the LED or IRED has a large PN-junction area whose(10)is tailored to the application. 供选择的答案: 1.wavelength 2.shape 3.emit 4.device 5.resembles 6.bright 7.visible 8.consists 9.differences...
1. A form of electromagnetic energy that can be perceived by the human eye. It is made up of electromagnetic waves that travel at a speed of about 186,282 miles (299,728 kilometers) per second. 2. Electromagnetic energy that cannot be perceived by the human eye, as infrared light and ...
Energy saving light bulb are often called low energy lamps because they use less energy than the traditional tungsten filament bulbs that they replace. As they plug in directly to the normal light fittings. Energy saving light lamp inside is coated with a phosphor that gives off the light and...
energy field. As the focus of those thoughts shift and change, the pattern of colors in the aura and the quality of the light source, also shifts and changes. The brighter and higher the frequency of light that is generated from our developed consciousness, the more strength and influence, ...
It searches for extremely high energy gamma rays. Scientists have spotted 12 gamma-ray hot spots. These are parts of the sky from which the gamma rays are sent out. Those hot spots show that our galaxy, the Milky Way, has powerful particle accelerators (加速器). But those particle ...
In many countries, wind turbines(风力发电机) are very common(普通的).A groupof turbines is called a wind farm. Wind farms are usually in fields(田地).Wind energy(能源) has several advantages. One advantage is that there will alwaysbe wind. Wind power s also clean. It doesnt cause(引起...
Visible light is only a narrow part of the spectrum that is most familiar to us because our eyes can detect it. In the Newtonian model of the universe everything is made of particles, including light. Scientists began to think of light as being made from tiny "balls" of energy called...