The laser light is intense. However, only certain lasers are powerful. Although it may seem, it is not a contradiction. Intensity is a measure of power per unit area, and even lasers that emit only a few milliwatts can produce a high intensity in a beam of a millimeter in diameter. In fact, its intensity can be equal to that of sunlight. Any ordinary lamp emits a light amount much higher than that of a small laser, but scattered around the room. Some lasers can produce many thousands of watts continuously, while others are able to produce billions of watts in a pulse whose duration is only a billionth of a second.
The laser beams are narrow and do not disperse as the other beams. This quality is called directionality. It is known that not even light a powerful bulb does go too far: if you focus to the sky, its rays seems to fade away. The beam of light begins to spread in the memento in which out of focus, to achieve that degree of dispersion which comes to lose its usefulness. However, laser beams have successfully captured a few watts of power on the moon and its light was still bright enough to see it from the ground. One of the first laser beam is fired at the moon in 1962 only to disperse lleg6 four kilometers above the lunar surface. Not bad considering that he had traveled four thousand miles!
Laser light is coherent. This means that all light waves from a laser are coupled together neatly. An ordinary light, such as from a light bulb generates light waves that begin in various mementos and move in different directions. Something like what happens when you throw a handful of pebbles into a lake. The only thing that you create are small splashes and some undulations. Now, if these stones are thrown one by one with a frequency exactly regular and fair in one place, you can generate a wave in water of greater magnitude. This is the way a laser, and this particular property may have different utilities. Put another way, a bulb or a light bulb cartridges are like guns, while a laser is equivalent to a machine gun.
The lasers produce light of one color, or to put it technically, the light is monochromatic. The common light contains all colors of visible light (ie, spectrum), which combined are targeted. The laser beams were produced in all colors of the rainbow (though the most common is red), and in many types of invisible light, but a laser can only issue determined exclusively one color. There tunable lasers that can be adjusted to produce different colors, but even they can not issue more than a single color as a memento. Certain lasers can emit various frequencies monochromatic at the same time, but not a continuous spectrum containing all colors of visible light can do a light bulb. In addition, there are numerous projecting invisible light lasers, and infrared and ultraviolet.
WHAT IS THE USE OF LASERS?
The range of applications of lasers is surprising, to the point of reaching a much wider area than originally conceived by the scientists who designed the first models (though hardly admit it), and far exceeds the vision of the first science-fiction writers, who in most cases only failed to see in it a futuristic weapon, (but do not seem willing to confess their lack of imagination.) Also surprising is the variety of existing lasers.
At one end of the range are made from tiny lasers semiconductor wafer similar to those used in electronic circuits, with a size no bigger than a grain of salt. Gordon Gould, a pioneer in this field, confessed he was impressed when they were introduced. At the opposite end military lasers are the size of a building, which the military is currently experiencing very different from the guns they had imagined lanzar rayos writers of science fiction.
In this book we intend to not only talk about lasers, but also explain their current applications, as well as a near future, and how that will affect, therefore our lives.
Tasks performed by the laser ranging from the mundane to the esoteric but share a common element: they are difficult or totally impossible with any other instrument. Lasers are devices relatively expensive and usually only used for its ability to provide the form and amount of energy required in the desired location.
For more detail, visit strobes lights and laser websites.
This post was made using the Auto Blogging Software from WebMagnates.org This line will not appear when posts are made after activating the software to full version.
No comments:
Post a Comment