[HN Gopher] Webb Mirror (2022)
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       Webb Mirror (2022)
        
       Author : pavel_lishin
       Score  : 35 points
       Date   : 2023-09-03 22:35 UTC (1 days ago)
        
 (HTM) web link (neil.fraser.name)
 (TXT) w3m dump (neil.fraser.name)
        
       | namanyayg wrote:
       | This article is interesting in itself but I found a lot more by
       | clicking the links in the left sidebar. The blog reminds me of
       | the old web in the best possible ways, kudos to the author.
        
         | [deleted]
        
       | rob74 wrote:
       | Cool! Just don't make it curved, like the original Webb mirror -
       | or, if you do, make sure to never ever let direct sunlight hit
       | it...
        
         | Y_Y wrote:
         | For real though, focussing something like that is not easy.
         | Unless you're measuring your angles really carefully you're
         | probably not going to create a death ray.
         | 
         | There have been some attempts (including a couple by
         | Mythbusters) to replicate the legendary heat ray of Archimedes,
         | but it looks somewhat implausible with the tech of the time.
         | 
         | https://en.wikipedia.org/wiki/Archimedes%27_heat_ray
         | 
         | However Richard Hammond did have an toy experiment at Keck with
         | a mirror with a diameter of about a metre and did have some
         | success: https://www.youtube.com/watch?v=ix_tsqKzkrQ&t=3384
        
           | msk-lywenn wrote:
           | I once cooked an egg with the sunlight hitting the
           | window/mirrors of the Cite Mondiale building in Bordeaux. It
           | was a really hot day, it took about an hour, it was the best
           | fried egg I ever had.
           | https://www.beam.fr/phototheque/?context=location%7C83
        
       | deugtniet wrote:
       | If you're interested the Webb mirror, and the relationship
       | between resolving ability, wavelength and mirror size I really
       | recommend the deep dive Huygens optics did on the subject.
       | 
       | https://www.youtube.com/watch?v=gOpbXBppUEU
       | 
       | The guy makes his own lenses, and loves to explain what he does
        
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       (page generated 2023-09-04 23:01 UTC)