Available online
Description
Paleomagnetism tells us a lot about how the Earth's magnetic field has behaved in the past, and some of these results are discussed in Unit 23. Now for something completely different. As far as w...e know, the only viable theory for the origin of the magnetic field is motions in the earth's core. But is such a mechanism feasible? Obviously, we can't find out what the motions in the earth's core are like, but we think that the actions in the earth's core are something like a dynamo, and what we can do is build a model of this.
Paleomagnetism tells us a lot about how the Earth's magnetic field has behaved in the past, and some of these results are discussed in Unit 23. Now for something completely different. As far as w...e know, the only viable theory for the origin of the magnetic field is motions in the earth's core. But is such a mechanism feasible? Obviously, we can't find out what the motions in the earth's core are like, but we think that the actions in the earth's core are something like a dynamo, and what we can do is build a model of this.
| Module code and title: | S100, Science foundation course |
|---|---|
| Item code: | S100; 23 |
| Recording date: | 1971-02-08 |
| Recording location: | Alexandra Palace, London |
| First transmission date: | 1971-07-04 |
| Published: | 1971 |
| Rights Statement: | Rights owned or controlled by The Open University |
| Restrictions on use: | This material can be used in accordance with The Open University conditions of use. A link to the conditions can be found at the bottom of all OUDA web pages. |
| Duration: | 00:23:58 |
| + Show more... | |
| Director: | Penny Crompton |
| Producer: | Nat Taylor |
| Contributors: | Michael Pentz; Peter Smith; Rod L.Wilson; Frank J. Lowes |
| Publisher: | Open University |
| Subject terms: | Paleomagnetism; Geomagnetism; Geodynamics; Dynamo theory (Cosmic physics); Earth (Planet)--Internal structure; Earth (Planet)--Core |
| Production number: | JOUZ378D |
| Videofinder number: | 2851 |
| Available to public: | no |
