# Lesson 17: <br>Special Relativity, 3

> Bringing Electricity and Magnetism together with something different from Newton!

```{admonition} &nbsp; What's Coming:
Now that we've appreciated that space and time have very different jobs in Relativity, we need to think about what that means for our old friend, speed. After all, it's space divided by time. That, and a re-examination of electromagnetism were advanced by Hendrik Lorentz, a friend of Einstein's and the guy who nearly got there first. Looking at speed through Relativity glasses will lead to a realization: we're trapped at sub-light-travel. Despite Star Trek.
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