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下面为大家整理一篇优秀的paper代写范文- Understanding of Light，供大家参考学习，这篇论文讨论了对光的认识。在人们的生活当中，光现象是最为常见的一种，不论是白天的日光、黑夜中的月光等自然光线，还是电灯产生的人工光线，都是我们生活中不可或缺的部分。光作为人们常见的一种自然现象，在古往今来对其研究的过程中，也遵循着这一规律，人们对光的认识在不断的加深，并且逐渐的将光应用到了很多领域当中，为社会的发展做出了重要的贡献。

In people's lives, meet a lot of natural phenomena, including light phenomenon is the most common one, whether it is daylight in the daytime, the Moonlight in the night, such as natural light, or light produced by artificial light, are the indispensable part of our lives. Therefore, this article has carried on the research to "the light" this phenomenon, first elaborated in the different time people's understanding of the light essence, then discussed according to "the Light" the understanding and receives the inspiration, hoped can for everybody better understand "the light" provides some reference.

In the development process of human beings all over the world, although the development process has some differences, it will also have certain similarities, that is, from simple to complex, from low-level to advanced, from part to whole. and light as a common natural phenomenon, in the course of the study of it in the ages, also follow this law, people's understanding of light is constantly deepened, and gradually applied to many areas of light, for the development of society has made an important contribution. Therefore, our high school students as the pillars of the motherland, strengthen the "light" understanding is of great significance.

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In the early stage of social development, people have studied light, and in different periods, because of the influence of science level, thought idea and other factors, people's understanding of light is different, we can find it mainly in the following stages from textbooks:

The process of studying light can be traced back to more than 2000 years. During the period of the spring and autumn in China, the light has been applied to certain, such as in the "Ink Sutra" recorded in such a sentence "scene to, in the afternoon, with the King Long, said in the end", this passage reflects the principle of small aperture imaging. In this period of time abroad also to the "light" research, Euclid discovered the light reflection phenomenon, and put forward the corresponding law of reflection. In this period of research, mainly through the observation of the light in nature, after a long period of accumulation, gradually produced a certain understanding of light. Although the understanding of light in this stage is relatively simple, the results are not many, but it is the research of this stage, which provides the important basis for the follow-up research.

After more than 1800 years of study, the study of optics has entered into the age of geometrical optics since 16th century. In this period, people further increased awareness of light. Meanwhile, in 1657, after several years of research, Fermat studied the principle of fee-horse through the analysis of light propagation, which is the principle that light travels through straight lines when it spreads from one point to another in any medium. But by 17th century, further studies of light revealed that this principle and the actual existence certain difference, for example the light source is a point, after the direct pole irradiation will discover, compared to afore-mentioned theory analysis the shadow to be wider, in this kind of situation, the people also explored this question, The diffraction phenomenon of light is gradually studied. In the 17th century, the famous scientist Newton studied it, in the study found that white light is not just a color, but composed of a variety of colors, for the later three primary colors of the discovery made a contribution. At the same time, it puts forward a hypothesis of optical structure, which is composed of particles, and transmits it in the corresponding medium in a straight line. However, some people do not agree with this principle, the most famous is Huygens, he thinks light is a wave. Under the influence of many factors, this period is dominated by particle theory, but the emergence of Huygens theory lays a foundation for the emergence of the next optical age.

In the 19th century, on the basis of Huygens theory, the study of optics gradually entered into the era of wave optics. Early in this period, scientists used certain principles to infer the existence of wavelengths, and measured the wavelength of natural light, the Huygens principle has been a certain perfect, thus appearing a more comprehensive theory, that is, Huygens-Fresnel principle, in this principle, the phenomenon of all of the lights related to the exposition, is a key principle in optics. In the the 1750s, with the advent of electromagnetism, the researchers also made a certain connection between light and electromagnetism, observed that the magnetic field will affect the transmission of light, found the relationship between the two, thus discovering the principle of electromagnetic induction, magnetic resistance, Faraday electrolysis law. So, in this moment, it is recognized that light is a wave.

At the beginning of the last century, with the development of science and technology, the study of light came into the micro-age and realized the characteristics of the optical particles. During this period, a large number of experiments related to this, such as blackbody radiation, photoelectric effect, and so on, on the basis of these studies, Einstein summed up the theory, put forward the optical quantum hypothesis, but there is also a certain flaw in the hypothesis, that is, the polarization phenomenon can not be reasonably explained. Therefore, the two theories are combined to form the theory of wave-particle duality, which has been widely used for a long time.

Through the above analysis, we can find that the process of light cognition is divided into four stages, and the light has different knowledge in different stages. In each new understanding, it is necessary to negate the previous theory, and then put forward different hypotheses, and established above this hypothesis. Therefore, in the study of light after us, we must continue this process, the courage to challenge the authority, bold innovation, on the basis of predecessors, further understanding of light, so that the better light for the application, for the development of society to provide stronger protection.

To sum up, different periods of light have different understanding. Our high school students as the future of social development builders, need to better understand the nature of light, and in the past, when the knowledge is still not complacent, to dare to innovate, broaden the understanding of the light level, so as to better participate in the future construction of the motherland.

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