Grace Hopper on Letterman on HackerTube: recommended by 1 Hacker News commenter across 1 month, 2016–2018.
interview · evergreen
Grace Hopper appears on Letterman and uses a foot-long piece of wire to show how far light travels in a nanosecond.
Brought up whenever latency, light speed or the size of a nanosecond comes up, as the classic physical demonstration.
“this seminal scene between the great, late Grace Hopper and David Letterman”
3 Hacker News comments link this video. Each one links back to its thread.
No mention of the foot per nanosecond is complete without this seminal scene between the great, late Grace Hopper and David Letterman: ▶ this video
in “The fifth hyperfactorial: 5⁵ × 4⁴ × 3³ × 2² × 1¹ milliseconds is exactly 1 day” · View on HN
Lightnanoseconds are a useful measure in everyday life as well. A lightnanosecond is about 30cm, or 1 foot. ▶ this video
in “Traveling to the Sun: Why Won't Parker Solar Probe Melt?” · View on HN
Latency Math (Almost 100ms faster then current technology) EDIT: This is only one way ALSO Grace Hopper telling David Letterman what a nano second is! ▶ this video 1 Nanosecond = distance light travels one foot 1 mile = 5260 nanoseconds (In a vacuum) Current Satellite Internet = 22,000 miles or 115720000 Nano Seconds = 115.72 ms SpaceX Low Orbit = 715 to 823 Miles 823 miles = 4328980 nano seconds = 4.3 ms
in “SpaceX plans worldwide satellite Internet with low latency, gigabit speed” · View on HN