[throw0101a]

> Light is slow, not exactly 1 foot per nanosecond but it's a reasonable mnemonic.

"Admiral Grace Hopper Explains the Nanosecond" is a good illustration of this (segment is only 2m):

* https://www.youtube.com/watch?v=9eyFDBPk4Yw

* https://en.wikipedia.org/wiki/Grace_Hopper

Full lecture:

* https://www.youtube.com/watch?v=ZR0ujwlvbkQ