| 4. Particle Beams and Accelerators |
We have seen that we can use larger and larger machines to reduce the de Broglie wavelength of high energy particles. This should, in theory, enable us to resolve the ultra-fine structure of matter. However it's not as simple as that. We don't get nice clear images of quarks and gluons tucked away in their nucleons. The little diagrams reproduced in text books have been worked out carefully by awfully clever chaps who spend hours looking at the results of massively expensive particle physics experiments.
It has been said that particle physics resembles the person who wants to know how a watch works and finds out by smashing it hard with another watch, and tries to reassemble the bits that have flown out all over the place.
Here is a concept map of the unit.

These particle physics experiments are massively expensive, way beyond the budget of any single university physics department. Therefore, when CERN was built in Geneva, a way of sharing data was found whereby groups could post their results for other departments to use.
Professor Timothy Berners-Lee produced a computer language, hypertext mark up language (HTML), in which these pages are written - and most other pages on the world wide web.
A useful spin-off indeed.