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1 What are scattering and tunnelling?

The phenomenon of scattering was an important topic in physics long before the development of wave mechanics. In its most general sense, scattering is a process in which incident particles (or waves) are affected by interaction with some kind of target, quite possibly another particle (Figure 1). The interac
Author(s): The Open University

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Acknowledgements

The content acknowledged below is Proprietary (see terms and conditions). This content is made available under a Creative Commons Attribution-NonCommercial-ShareAlike 2.0 Licence

All written material contained within this unit originated at the Open University.


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Keep on learning

Study another free course

There are more than 800 courses on OpenLearn for you to choose from
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2.2 Bell and Tainter improve the phonograph

If Edison was not willing to continue development of the phonograph then others were. Alexander Graham Bell, who had risen to prominence through his invention of the telephone, took a great interest in recording sounds, even suggesting to Edison that they might collaborate. Edison refused, so Bell set about developing a recording machine with the assistance of his cousin Chichester Bell, a chemical engineer, and Charles Tainter, a scientist and instrument maker. By 1887 Bell and Tainter had s
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5.3 How devolution in Scotland differs from devolution in Wales

Devolution for Wales, rejected by the Welsh in a 1979 referendum, was also part of the constitutional reform package of the Labour government. However, in September 1997, the Welsh voted for the establishment of a National Assembly for Wales. The referendum result in favour was far narrower than in Scotland. On a 50.3 per cent turn-out in Wales, only 50.6 per cent voted in favour, indicating a far less entrenched sense of political identity and difference from the rest of the UK on the part o
Author(s): The Open University

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Conclusion

This free course provided an introduction to studying Computing & IT. It took you through a series of exercises designed to develop your approach to study and learning at a distance, and helped to improve your confidence as an independent learner.


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Metric spaces and continuity
This free course contains an introduction to metric spaces and continuity. The key idea is to use three particular properties of the Euclidean distance as the basis for defining what is meant by a general distance function, a metric. Section 1 introduces the idea of a metric space and shows how this concept allows us to generalise the notion of continuity. Section 2 develops the idea of sequences and convergence in metric spaces. Section 3 builds on the ideas from the first two sections to formu
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4.5 Endocrine disruptors

Then he was a she…

(Lou Reed, American rock singer)

In 1996, a book called Our Stolen Future was published, bringing to public attention a debate that had been simmering among biologists for some time. Written by Theo Colborn and two colleagues at the World Wildlife Fund (WWF), this book presented the hypothesis that certain industrial chemicals, commonly found as environmental pol
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Structural Integrity: designing against failure
The Kinzua rail viaduct, in Pennsylvania, collapsed when it was hit by a tornado in 2003. First built in 1882 and redesigned 1900, it was at one time the highest bridge in the world. The two video tracks in this album tell the story of the Kinzua catastrophe. The subsequent forensic investigation has cast new light on the failure of Tay rail bridge in Scotland 125 years earlier; with 75 people killed, the worst ever disaster to befall a trestle bridge. This material forms part of the course T3
Author(s): The iTunes U team

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4.2.5 Adverbs

Adverbs modify verbs, adjectives and other adverbs, for example runningquickly, veryclever, quitewell.

Adverbs of manner describe how the action of the verb is being done, for example boldly, graciously, well.

Adverbs of time show when the action of the verb is taking place, for example today, then.

Adverbs of place show where the action of the verb is taking place, for example here.
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2.2.1 Summary

  • Children's developing understanding of gender can be described as a search for certainty.

  • Young children make mistakes about gender illustrating their rigidity and their naive certainty regarding gender.

  • As children's knowledge of gender grows in complexity, basic biological knowledge is added to their social-cultural understanding.

  • Research by Francis illustrating girls' ‘sensible-selfless’ and boys'
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TALAT Lecture 2101.02: The product development process
This lecture provides a brief introduction to the product development process and systematic design. It aims at generating interest in and a common understanding of the product development process; telling about the basic principles and terminology used in connection with systematic design in order to facilitate the use of the four product design examples presented in this course (see TALAT lectures 2102.01 - .04). The lecture is recommended for those situations, where a brief, general backgrou
Author(s): TALAT,Mogens Myrup Andreasen, Technical University

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Lord Rees: The World in 2050 and Beyond
In this IPR Public Lecture, Astronomer Royal, life peer and Cambridge scholar Lord Rees surveys the century ahead and the prospects it offers mankind. From AI and robotics to climate change and mass extinction, he makes the case that this is a time of great potential - for success as well as catastrophe. This IPR Public Lecture took place on 9 February 2017.
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Art History in a Hurry - Mona Lisa
This is a fascinating video about this famous painting. Wouldn't you like to know why she has no eyebrows? (02:17)
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Understanding Online Interaction
This course is designed to provide an introductory level of understanding of the manner in which individuals interact with one another via the network. Possession of this understanding is absolutely critical to your ability to design effective learning environments on the network. This course takes an immersion approach to helping you develop your understanding by requiring you to make extensive, reflective use of several representative interactive media. You will also read several representativ
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2.5 Introduction to John Locke
Part 2.5. Introduction to the philosophy of John Locke, 'England's first Empiricist', he also gives a very simplistic definition of Empiricism; we obtain knowledge through experience of the world, through sensory data (what we see, hear, etc).
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Mosaic from Acholla
A look at a mosaic found in Acholla, Tunisia, and how it reflects the popular trends of the time
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The physical world: waves and relativity
An introduction to this album.
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An introduction: Sacking prime ministers
A short video introduction to this album
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A discussion of housing issues
Professor Chris Hamnett discusses his study of housing issues and its relevance to social scientists.
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