Richard Feynman talks about light on HackerTube: recommended by 4 Hacker News commenters across 4 separate months, 2018–2025.
explainer · evergreen
A PBS clip in which Richard Feynman explains the strange nature of light and electromagnetic radiation. He conveys how little of it we actually see and how radio waves are present everywhere.
Recommended as an entertaining, accessible way to get a feel for light and electric fields.
“I highly recommend you watch this video of Feynman explaining light”
6 Hacker News comments link this video. Each one links back to its thread.
I'm sure a lot of people here have already seen this, but for those who haven't I highly recommend you watch this video of Feynman explaining light, ▶ this video He had an amazing ability to make physics fun and entertaining. I could listen to him talk all day.
in “Richard Feynman's blackboard at the time of his death (1988)” · View on HN
Let's try to work the problem in a way that avoids pedantry, just for a moment. This is one of my favorite PBS clips from the 80's in which Richard Feynman explains how strange the nature of light and by extension all of electromagnetic radiation. ▶ this video If you listen carefully, you notice that he never talks about wave/particle duality (because he wasn't giving a classroom lecture). What he does talk about is an electric field that waves slosh around in, and that something "elaborate and complicated" is going on at a deeper level. That's what I'm on about, if you were pressed to explain it so that a bright child would get it, how would you do that?
in “Ask HN: What is a science fact that blew your mind when you learned it?” · View on HN
Richard Feynman gets very excited about this very fact, that at any point it has ALL of the radio waves, amongst other electromagnetic radiation, that just has to be tuned in or focussed on. ▶ this video
in “How is portable AM radio possible?” · View on HN
The potential is obvious once you really start to grasp the reality of the electric field and its properties. (A favorite Feynman vid to give laymen a taste: ▶ this video ) I don't see how any worthwhile possibilities can be realized at the amateur level however given just two of the restrictions I pointed out in a sibling thread...
in “The Backbone of VHF Amateur Radio May Be Under Threat” · View on HN
I don't think that's what the poster meant. I think it was probably more along the lines of how you experience e.g. 'light' vs. what it actually is : ▶ this video (The vast majority of light is effectively invisible to you.)
in “The regress argument against Cartesian skepticism (2012) [pdf]” · View on HN
Oh, but you can see past events while wielding (or not wielding) a time crystal. Vision is far out: ▶ this video
in “Physicists have filmed the oscillation of a time crystal” · View on HN