# When Does Time Slow Down? GPS and Relativity

- Institution: Gresham College
- Speaker: Professor Nils Andersson
- Level: For everyone
- Language: English
- Subjects: Physics, Astronomy and space
- Source: [Gresham College](https://www.gresham.ac.uk/watch-now/when-does-time-slow-down-gps-and-relativity)
- Licence: [Educational use (Gresham College's terms)](https://www.gresham.ac.uk/terms-and-conditions)
- Who can watch: Tweens profiles and older (sources give no ratings; placed by Invisible Network from the source's own words)

Professor Andersson explains the relationship between General Relativity and the use of GPS satellites.

## Lectures

1. [When Does Time Slow Down? GPS and Relativity](https://invisiblenetwork.ai/learn/gresham/when-does-time-slow-down-gps-and-relativity/fa5883087be9) (YouTube)