26:30 duration 26 minutes 30 seconds
Time Variations of the Observed Magnetic Field
Introduction to Geophysics: Time Variations of the Earth's Magnetic Field
24:45 duration 24 minutes 45 seconds
The Earth's Main Magnetic field
Introduction to Geophysics: The Earth's Main Field
02:48 duration 2 minutes 48 seconds
CL - Lecture 4b - Visualising Negation
What is the difference between 'a' and 'not a'? Here we visualize them on a globe instead of a plane.