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Author Topic: How is a London skyscraper melting cars?  (Read 2072 times)

Offline thedoc

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How is a London skyscraper melting cars?
« on: 11/09/2013 14:05:55 »
The 'Walkie Talkie' in London has been damaging cars this week by acting as a parabolic reflector, targeting the sun's rays on passers by...

Read the whole story on our website by clicking here

  
« Last Edit: 11/09/2013 14:05:55 by _system »


 

Offline CliffordK

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Re: How is a London skyscraper melting cars?
« Reply #1 on: 11/09/2013 11:57:45 »
Also see discussion here.

Yes, the Walkie Talkie building is an "imperfect" parabolic reflector creating a rather large hot spot, and of course using mostly transparent window glass rather than mirrors as the reflective surface.  But it does reach several times the intensity of the normal sunlight over a fairly diffuse area.

The hot spot is predicted to reach street level only for a few weeks a year, but I've seen little discussion of the effects as it rises into neighboring buildings.
 

Offline RD

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Re: How is a London skyscraper melting cars?
« Reply #2 on: 11/09/2013 15:11:17 »
Quote from: thenakedscientists.com/HTML/news/news/1000306/
1. A parabolic reflector is a curved, mirrored surface which can be used to collect and focus energy in the electromagnetic spectrum
http://www.thenakedscientists.com/HTML/news/news/1000306/

They work with sound too : parabolic microphone ...





https://en.wikipedia.org/wiki/Acoustic_mirror
« Last Edit: 11/09/2013 15:24:20 by RD »
 

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Re: How is a London skyscraper melting cars?
« Reply #2 on: 11/09/2013 15:11:17 »

 

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