- •Государственное образовательное учреждение высшего профессионального образования «Сибирский государственный аэрокосмический университет
- •Preface
- •Credits
- •Table of contents
- •Unit 1 what is science?
- •Part 1: principles of effective reading
- •Skimming: for getting the gist of something
- •Detailed reading: for extracting information accurately
- •Text a the discovery of X-rays
- •Text b call for tolerance towards some 'stem cell tourism'
- •Text c general guidelines
- •Part 2: oral or written?
- •Group 1
- •The academic audience
- •Levels of formality
- •The range of formality Technical → Formal → Informal → Colloquial
- •Part 3: what is science?
- •What is science?
- •Part 4: technology: pros & cons
- •Part 5:listening for academic purposes
- •The Computer Jungle
- •Unit 2 science to life: between the lines
- •Part 1: how effectively can you read?
- •Reading skills for academic study
- •Using the title
- •Part 2: paragraph development and topic sentences
- •Text a Science and Technology
- •Text c Research: Fundamental and Applied, and the Public
- •Part 3: scientists' brain drain Task 16. You are going to read a magazine article (Text a). Choose the most suitable heading from the list (1 – 9) for each part (a – j) of an article
- •Text a highlights of the north
- •Text b bio tech brain drain: are too many talented scientists leaving the southeast?
- •Part 4 reading skills for success
- •Reading skills for success: a guide to academic texts
- •Collocations
- •Part 5: listening for academic purposes
- •Going Digital: The Future of College Textbooks?
- •Part 6: grammar review sentence structure
- •1. Simple sentence:
- •2. Compound sentence:
- •3. Complex sentence:
- •Unit 3 order of importance
- •Part 1 academic vocabulary
- •C a social occasion to which people are invited in order to eat, drink and enjoy themselves
- •A a way of dealing with a problem, an answer
- •Part 2 Coherence
- •The importance of stupidity in scientific research
- •Consumerism is 'eating the future'
- •Now fly me to the asteroids as well
- •Cohesion: Using Repetition and Reference Words to Emphasize Key Ideas in Your Writing
- •Repetition of Key Words
- •Rotation may solve cosmic mystery
- •Part 3 writing & speaking fundamentals
- •Article 1 shapefile technical description
- •Article 2
- •Article 3
- •Article 4 disposable containers for a disposable society
- •Article 5 knowledge, theory, and classification
- •The table of the useful vocabulary
- •Part 4: listening for academic purposes
- •Part 5:grammar review (punctuation)
- •Unit 4 matter of perspectives
- •Part 1 mistakes and negligence
- •Text a mistakes and negligence
- •(1) Changing Knowledge
- •(2) Discovering an Error
- •Part 2 Comparison and Contrast
- •Part 3 listening for academic purposes
- •Recognising lecture structure
- •1. Introducing
- •Unit 5 research misconduct
- •A Breach of Trust
- •Task 4. Study the second case.
- •Treatment of Misconduct by a Journal
- •Part 2 reading skills for academic study: note-taking
- •How to take notes
- •Part 3 preparing an abstract
- •Abstract 1 The hydrodynamics of dolphin drafting
- •Abstract 2 Recomputing Coverage Information to Assist Regression Testing
- •Abstract 3 Methods for determining best multispectral bands using hyper spectral data
- •Abstracts and introductions compared
- •Introduction
- •Introduction
- •Text a The Biosphere: Its Definition, Evolution and Possible Future
- •Introduction
- •Text b The Environment: Problems and Solution
- •Text d The Biosphere: Natural, Man-Disturbed and Man-Initiated Cycles
- •Part 4 listening for academic purposes Giving background information
- •Showing importance/Emphasising
- •Unit 6 finding meaning in literature
- •The Selection of Data
- •Lexical & grammar review
- •Part 2 avoiding plagiarism
- •3. Plagiarism!
- •4. Plagiarism is bad!!
- •5. The importance of recognizing the plagiarism
- •Is It Plagiarism?
- •Part 3 evaluating sources
- •Sample mla Annotation
- •Sample apa Annotation
- •Task 22. Analyse an extract of the following annotated bibliography. Define its format.
- •Ethics in the physical sciences course outline and reference books
- •Philosophy
- •The life of a scientist
- •Ethics for scientists
- •A few cautionary notes on saving Web materials
- •Unit 7 writing & publishing Objectives
- •Part 1 sharing of research results
- •The Race to Publish
- •Part 2 how to read an academic article
- •Article 1
- •50 Million chemicals and counting
- •Article 2 sun is setting on incandescent era
- •How to read a scientific article
- •Part 3 how to write an academic article
- •Publication Practices
- •Restrictions on Peer Review and the Flow of Scientific Information
- •Guidelines for Writing a Scientific Article
- •Part 4 listening for academic purposes
Text a the discovery of X-rays
When were X-rays discovered?
Who discovered them?
What are the four characteristics of X-rays?
Except for a brief description of the Compton effect, and a few other remarks, we have postponed the discussion of X-rays until the present chapter because it is particularly convenient to treat X-ray spectra after treating optical spectra. Although this ordering may have given the reader a distorted impression of the historical importance of X-rays, this impression will be corrected shortly as we describe the crucial role played by X-rays in the development of modern physics.
X-rays were discovered in 1895 by Roentgen while studying the phenomena of gaseous discharge. Using a cathode ray tube with a high voltage of several tens of kilovolts, he noticed that salts of barium would fluoresce when brought near the tube, although nothing visible was emitted by the tube. This effect persisted when the tube was wrapped with a layer of black cardboard. Roentgen soon established that the agency responsible for the fluorescence originated at the point at which the stream of energetic electrons struck the glass wall of the tube. Because of its unknown nature, he gave this agency the name X-rays. He found that X-rays could manifest themselves by darkening wrapped photographic plates, discharging charged electroscopes, as well as by causing fluorescence in a number of different substances. He also found that X-rays can penetrate considerable thicknesses of materials of low atomic number, whereas substances of high atomic number are relatively opaque. Roentgen took the first steps in identifying the nature of X-rays by using a system of slits to show that (1) they travel in straight lines, and that (2) they are uncharged, because they are not deflected by electric or magnetic fields.
The discovery of X-rays aroused the interest of all physicists, and many joined in the investigation of their properties. In 1899 Haga and Wind performed a single slit diffraction experiment with X-rays which showed that (3) X-rays are a wave motion phenomenon, and, from the size of the diffraction pattern, their wavelength could be estimated to be 10-8 cm. In 1906 Barkla proved that (4) the waves are transverse by showing that they can be polarized by scattering from many materials.
There is, of course, no longer anything unknown about the nature of X-rays. They are electromagnetic radiation of exactly the same nature as visible light, except that their wavelength is several orders of magnitude shorter. This conclusion follows from comparing properties 1 through 4 with the similar properties of visible light, but it was actually postulated by Thomson several years before all these properties were known. Thomson argued that X-rays are electromagnetic radiation because such radiation would be expected to be emitted from the point at which the electrons strike the wall of a cathode ray tube. At this point, the electrons suffer very violent accelerations in coming to a stop and, according to classical electromagnetic theory, all accelerated charged particles emit electromagnetic radiations. We shall see later that this explanation of the production of X-rays is at least partially correct.
In common with other electromagnetic radiations, X-rays exhibit particle-like aspects as well as wave-like aspects. The reader will recall that the Compton effect, which is one of the most convincing demonstrations of the existence of quanta, was originally observed with electromagnetic radiation in the X-ray region of wavelengths.
Task 4. Read the title and the abstract of the article (Text B). Say (a) what the text is about (skimming), (b) whether you would like to read a full version and use the article as a resource for your research.