Lab report about prism spectrometer Example | Topics and Well Written Essays - 1000 words

About prism spectrometer - Lab Report Example Those colors emanated from the, white, Hydrogen and Mercury light sources. The main objective of carrying out this study on prisms is to learn the aspects of prism spectrometer theory so as to enhance the ability of explaining the practicability of its components. This was mainly achieved through observation of the mercury spectrum discharge lamp while taking subsequent angle of deviation records regarding the spectral lines. This hence creates the capability of determining the refraction index of the given glass prism for a number of wavelengths. It also gives insights on how to utilize the calibrated prism for the ultimate measurement of unknown wavelengths. Finally, it enables one to make a general observation regarding color sensation that is caused by the prevailing light of specific wavelengths. The main tool that is used in this lab experiment is the spectroscope. This is an instrument that is used for production an ultimate viewing of spectra. It is often comprised of three main parts that includes; a collimator for production of parallel light beams, a prism that is majorly responsible for light dispersion towards the spectrum, and the telescope that is ultimately meant for spectrum examination (GutieÃŒ rrez-Vega, Julio et.at, 2007). When there is transmission of light beam from air to the glass, the bending of the ray occurs with accordance to the Snells law. Therefore this can be summarized by an equation that is stated as sin q air = n sin q glass; whereby the subsequent measurement of subsequent angles is done on the normal surface in which n refers to the refraction index of the entire glass. The refraction index is hence a dimension-less value and is simply a clear measurement of the intensity in which the medium can bend light. The increase in the size of n is directly proportional to the increased bending of light. The usual refractive index of air is always 1. For a glass, n often varies from the value of between 1.3 and 1.8,

Critical Reading Reflection Essay Example | Topics and Well Written Essays - 2000 words

Critical Reading Reflection - Essay Example The author starts by stating that â€Å"this is a hopeful book about those who fail.† (Rose, M., 2005 p. xi) and provides an account of the education system in America, so the book can be said to be a book about the hope the author holds for people who may be struggling with the American educational system. He goes on to stipulate that the low level of literacy skills in remedial students is not as a result of lack of intelligence but is rather due to insufficient economic and social conditions to support these students, as well as a history of poor education. The author believes that educators should have more confidence in the literacy abilities of such students and that there must be greater equality as regards educational opportunities in America. This book details the story of how the author learned to read, write and think critically, and how he came to start teaching others to also be able to read, write and think in a critical way. This book can be divided into two sec tions. The first section discusses the author’s journey as a student, and as a teacher. In this first section Rose learns to read, analyze and write, while engaging critically with text, and making use of language in a correct manner. In the second section, Rose learned how to teach to others these things he had learned as a student. The main connection between these sections is the connection that was made by the author himself about his own experiences. In the book, one can also feel the effect that the author’s teachers had on him. The teachers (Mr.Jonhson, Mr.Macfarland and Dr.Carothers) all affected the author’s experience and influenced his perspective about the issue of teaching. In the book, the author illustrates some examples of the perceived cultural and language barriers that students have to deal with from day to day, and discusses his experiences with students, including high school graduates with reading or writing difficulties. Due to the reading and writing difficulties faced by these students, they are usually branded as remedial students and therefore placed in special classes, regardless of the real causes of their inability to read and write at the predetermined level. These students may go through their school years, and even later into their adult lives bearing this stigma. In the first chapter, rose outlines the main issues about the American educational system, and his prognoses on these issues relegate the reasoning behind his opinions as stated in the book. The history and the policies that led to the ‘back to basics movement’ are also discussed, and it seems that educators and administrators in America believed that American students are a largely illiterate and insufficient group. Although the author does not directly challenge the necessity of examining the social and economic conditions in the educational system, he argues against â€Å"framing our indictments in terms of decline, a harsh, laced -with-doom assault, as insisting that our current educational standards do not meet or exceed the supposed perfection of past standards we lose the historical and social realities of American education† (Rose, M., 2005 p. 7). The author also argues against labelling some students as remedial students or punishing those that do not measure up to a false reality of success and advocates a better understanding of the cultural and social conditions that students face. Rose explains that the American society as a whole clings to