Laser Technology
Abstract: A laser is a electron device that produces a very narrow, powerful beam of light. The essential components of a laser include an active medium, an energy source, and an optical cavity. The optical cavity itself is enclosed by the resonator which has a mirror at each end. The energy that is put into the laser causes the atoms of the active medium to be excited to a higher energy level. When these atoms relax back down to their ground level they emit photons, which is part of a chain reaction that may cause other atoms to go through the same energy transitions resulting in light that becomes so intense that part of it exits through one of the mirrors as a very strong beam, known as a laser.
The practical uses of lasers are enormous. One of there biggest uses is that they have been used to read and write information on compact discs. Their revolutionary use in the fields of fiber optics communication and medicine are also worth noting.
A laser is a device that produces a very narrow, powerful beam of light. The term laser is an acronym for Light Amplification by Stimulated Emission of Radiation (Hecht 1982). In addition to being intense and narrow, laser beams are coherent, meaning that all of the light waves come out all lined up with one another and are of only one color. In a way a laser can be thought of as a superflashlight.
The ability to focus laser light so precisely makes it extremely powerful. For example, some beams can pierce a diamond, the hardest natural substance known to man, while others can trigger a small nuclear reaction. A laser bean can also be transmitted over long distances with no loss of power. Lasers also vary greatly in size. One is al...
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...d material as the active medium. Substances made of crystals or glass are generally used. Semiconductor lasers, which use semiconductors, which are materials that conduct electricity but do not conduct as well as copper or iron for example which are true conductors. Gas lasers, which use a gas or mixture of gases in a tube as the active medium, and dye lasers use a dye as the active medium (O'Shea).
Bibliography
Hecht, Jeff. Laser: Supertool of the 1980s. New York: Ticknor and Fields, 1982.
Hecht, Jeff. Understanding Lasers: An Entry- Level Guide. 2nd ed. New York: IEEE Press, 1993.
Laurence, Clifford. The Laser Book: A New Technology of Light. New York: Prentice Hall, 1986.
O'Shea, Donald. "Laser." World Book Encyclopedia. 1995 ed.
Whinnery, John. Lasers: Invention to Application. New York: National Academy Press, 1987.
The life of Mr. Loman is one of loneliness, and lies. An online source emphasizes about Willy, “Willy convinces himself that he is successful, well- liked, and that his sons are destined for greatness.” Willy’s mind is consumed with being popular, and having material wealth. The results of Willy’s internal problems resulted with his children that could not be stable in any aspect of their lives, his failing marriage, and him struggling throughout all of his adulthood. Edward states (an online source), “Willy spent his life pursuing the wrong dreams for him. The wrong dream slowly possessed his life.” And also states, “Willy appears to have been obsessed with his goal of being known as a great salesman rather than with actually being a great salesman.” Willy is constantly under attack with thoughts of his past, to the point he has such vivid flashbacks that he will openly be talking to him, but thinking is he talking to people of the past. An online source states, “Unable to cope with reality, he entirely abandons it through his vivid fantasies and ultimately through suicide.” Willy is aware of his mistakes, but spends his time looking forward to the ‘perfect’ future he has planned, but never changes his ways to achieve his goals. Mr. and Mrs. Loman realize how different and happy Willy is when he is working outside with his hands. Both characters recognize
The play, “Death of a Salesman” written by Arthur Miller, presents Willy Loman, as a salesman, who fails to earn a living and slowly loses his mind. Willy continuously seeks the past to find out where he went wrong. During his years in life, Willy wanted his two sons, Biff and Happy to become someone they’re not; Willy wanted them to become a salesman like him. However, because of his obsession in the American Dream of easy success and wealth, he created a life full of lies for himself and his sons. In the end because of “his misconception of himself as someone capable of greatness” leads to his downfall and the end of his life (Death of a Salesman).”
In brief, it is apparent that Willy’s own actions led to not only his own demise, but his children’s as well. The salesman tragically misinterpreted the American Dream for only the superficial qualities of beauty, likeability and prosperity. Perhaps if Willy had been more focused on the truth of a person’s character, rather than purely physical aspects, his family’s struggles and his own suicide could have been avoided. On the whole, Arthur Miller’s play is evidence that the search for any dream or goal is not as easy and the end result may seem. The only way to realize the objective without any despair is the opposite of Willy Loman’s methods: genuineness, perseverance and humility.
Willy Loman is a 60 year old senile salesman who desperately wants to be a successful salesman; however, his ideas about the ways in which one goes about achieving this are very much misguided, just as his morals are. He believes that popularity and good looks are the key to achieving the American dream, rather than hard work and dedication. He not only lives his entire life by this code, but instills his delusional beliefs in his two sons Biff and Happy. As a result, his sons experience similar failures in their adult lives. Willy led a life of illusion, lies and regret which not only ruined his life, but gad a negative impact on the lives of family as well.
Laser tissue interaction mainly contributes to absorption. The dental laser wavelength lies in the near, mid and far infrared region. The basic properties such as selective absorption, coagulation, sterilization and stimulatory effects are the most important parameters for selecting lasers for dentistry. The following lasers and their corresponding wavelength are commonly used for soft tissue interactions. In short dental lasers are relatively easy to use if the dentists have been trained properly. The lasers function with an end cutting action while other dental instruments are side cutting.
Like countless characters in a play, Willy struggles to find who he is. Willy’s expectations for his sons and The Woman become too high for him to handle. Under the pressure to succeed in business, the appearance of things is always more important than the reality, including Willy’s death. The internal and external conflicts aid in developing the character Willy Loman in Arthur Miller’s Death of a Salesman.
Throughout the play, Willy can be seen as a failure. When he looks back on all his past decisions, he can only blame himself for his failures as a father, provider, and as a salesman (Abbotson 43). Slowly, Willy unintentionally reveals to us his moral limitations that frustrates him which hold him back from achieving the good father figure and a successful business man, showing us a sense of failure (Moss 46). For instance, even though Willy wants so badly to be successful, he wants to bring back the love and respect that he has lost from his family, showing us that in the process of wanting to be successful he failed to keep his family in mind (Centola On-line). This can be shown when Willy is talking to Ben and he says, “He’ll call you a coward…and a damned fool” (Miller 100-101). Willy responds in a frightful manner because he doesn’t want his family, es...
In short, Willy Loman's unrealistic dreams caused his downfall. By trying to be successful with material desires and being "well-liked" he failed. By the play's end he had to lose his own life just to provide funding for that of his family. He put his family through endless torture because of his search for a successful life. He should have settled with what he had, for his true happiness included a loving family. Willy's example shows that one must follow their own dreams to be truly accomplished.
Arthur Miller's Death of a Salesman is a story about the dark side of the "American Dream". Willy Loman's obsession with the dream directly causes his failure in life, which, in turn, leads to his eventual suicide. The pursuit of the dream also destroys the lives of Willy's family, as well. Through the Lomans, Arthur Miller attempts to create a typical American family of the time, and, in doing so, the reader can relate to the crises that the family is faced with and realize that everyone has problems.
What is the "American Dream"? The "American Dream" cannot be defined. I know that my "American Dream" consists of a Porsche, a large house, and a happy family. Willy Loman's definition does not differ greatly from mine although while trying to pursue this dream, Willy's mind slowly drifted further and further away from reality. The "American Dream" is the idea that any man or woman can make his or her own fortune, despite his or her past. Willy is trying to achieve success through this thought, believing that being "well liked" and working hard will be enough to ensue his success. Willy was wrong.
Willy Loman will bring his downfall upon himself as he entices his own disillusions and the bedrock of his values pertaining to success and how one can achieve it. His failure to recognize the fruitless outcome of his own idealism will seal his fated suicide and have a determining effect on the failures of his two sons that when adolescent, idolized their father as a guid...
...nition of these terms. Arthur Miller, the playwright of Death of a Salesman intended this play to be a tragedy; this is what it should be interpreted as. As seen by this essay, it is clear that there is no right and true definition of the genre tragedy; it is as open to interpretation as the literature pieces are. Willy Loman represents a society striving for the American Dream, although he is of little importance in the standings of life. He is not popular or well-liked despite his hopes and dreams. He is a tragic hero who participated in the tragedy of Death of a Salesman.
WILLY: [with pity and resolve.] I’ll see him in the morning; I’ll have a nice talk with him. I’ll get him a job selling. He could be big in no time. My God! (Act 1)
Willy's main flaw is his foolish pride, this it what makes him a tragic hero. Yet there are many facets to his personality that contribute to the state he and the family are in during the play. His upbringing of the boys is one major issue, he raised them with the notion that if one is well-liked, he need not worry about qualifications, he believed that if his boys were popular they would come out on top. Sadly, he doesn't realize that the only way an ordinary person can get rich is through work (represented by Bernard) or through luck and good timing (Ben), and Willy missed the boat when it came to ...