Vakuum - vom Barometer zur Ultrahochvakuum-Apparatur
- Brötchen-und-Borussia
Lecture in the series " Brötchen und Borussia" and in the context of the Open Day of the TU Dortmund University by apl. Prof. Dr. Heinz Hövel (TU Dortmund University)
Air pressure often goes unnoticed in everyday life. But when we create a vacuum, i.e. an airless space, the air pressure surrounding us becomes noticeable. Many things change in a vacuum - for example, the propagation of sound or the boiling of liquids.
We go even further away from everyday reality when we consider the so-called "ultra-high vacuum". Here, the pressure is a factor of 1013 (10,000,000,000) times smaller than in our everyday life. Such a vacuum is costly to create, but it is very important for many experiments in physics and also in industry - for example, in the investigation of surfaces or in the semiconductor industry.
In this lecture, many surprising connections and effects in a vacuum will be presented. Live experiments will be shown, which of course can be followed particularly well when attending in the lecture hall.