Science & Technology Q&A for Kids (and others) [Part 46]

Stephen Wolfram hosts a live and unscripted Ask Me Anything about science and technology for all ages. Find the playlist of Q&A's here: wolfr.am/youtube-sw-qa
Originally livestreamed at: / stephen_wolfram
Outline of Q&A
0:00 Stream starts
2:31 Stephen begins the stream
2:43 Are research papers useful? How should I write them and when?
15:27 What do you think of research in engineering. Isn't it better to work in a company that specialises in a certain filed and knows it in and out and come up with something revolutionary instead of working at a university where everything is rather theoretical?
21:10 About 20 years ago I heard about holographic storage, what happened with this kind of technology that it didn't went forward?
46:30 Why do DVDs need to spin these days? Why not just scan top to bottom directly into memory? scanning optics aren't good enough for that?
47:23 How does DVD RW work? never understood that one
47:55 ​Follow up question to storing information, is there at present optical end to end computers "not storage" but work memory and the processing unit optical? And would it be easier or harder to have a multivalued optical computer "not binary" then the electronic?
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[@newenglandbarbell4647]

Starts @2:32 👌

[@newenglandbarbell4647]

These are such a joy to watch, thank you Stephen for taking the time to do them 👏🙌🙏

[@silberlinie]

50:54,
they take two panes of glass for a window.
Both can be polarized electrically.
One of the glasses is polarized at 90° to the other.
If you now activate both windows electrically, light
is blocked in both polarization directions.
And nothing can shine through.

[@stewartbrands]

In a fundamental space construct ,as in "atoms of space", how would a wave arise and collapse in a specific local frame of reference?

[@michaeljmcguffin]

49:03 "light by light scattering" - so interesting!

[@_ARCATEC_]

Reminded me to enjoy my records 🎧

[@theuniversewithin2037]

I feel like I can see my reflection in the gloss when I write sometimes