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20th Nov 2014, 3:14 pm | #1 |
Dekatron
Join Date: Apr 2011
Location: Cornwall, UK.
Posts: 13,454
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Wave Motion
Not sure if this video link has been posted before, excellent film showing wave motion, standing waves, impedance matching etc, ideal for those trying to grasp the concept.
The video starts off with a modern introduction then shortly afterwards continues into the old film: http://www.youtube.com/watch?v=DovunOxlY1k Lawrence. |
20th Nov 2014, 5:36 pm | #2 |
Guest
Posts: n/a
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Re: Wave Motion
There was something similar on a BVWS DVD a while ago, I must take a look at the AT&T archive later.
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20th Nov 2014, 7:10 pm | #3 |
Heptode
Join Date: Apr 2014
Location: Wigton, Cumbria, UK.
Posts: 728
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Re: Wave Motion
Thanks Lawrence, most informative and helpful
Nick |
20th Nov 2014, 8:13 pm | #4 |
Guest
Posts: n/a
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Re: Wave Motion
Just watched it, no dumbing down, lots of fact, OK I know most of it but having a picture and a clear explanation is worth a lot. Well done AT&T, I will look for more gems.
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20th Nov 2014, 9:14 pm | #5 |
Retired Dormant Member
Join Date: Jan 2011
Location: Egham, Surrey, UK.
Posts: 219
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Re: Wave Motion
Great link Lawrence. Many thanks as it took me back and was very refreshing.
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20th Nov 2014, 9:17 pm | #6 |
Retired Dormant Member
Join Date: Dec 2007
Location: Shropshire, UK.
Posts: 3,051
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Re: Wave Motion
Excellent - being largely self-taught, the concept of impedence as cause / effect was new to me, and most enlightening.
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21st Nov 2014, 2:28 am | #7 |
Dekatron
Join Date: Jan 2012
Location: Brentwood, Essex, UK.
Posts: 5,316
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Re: Wave Motion
I remember seeing a wave machine of this sort in a Royal Institution Christmas Lecture on the BBC back in the 1960's and always wondered how they worked. A Great film.
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21st Nov 2014, 5:09 am | #8 |
Moderator
Join Date: Mar 2012
Location: Fife, Scotland, UK.
Posts: 22,799
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Re: Wave Motion
It's awfully tempting to make one. The centre wire, the torsion spring, is probably piano wire. The elements could be any stiff wire of the right diameter. I assume the joints are spot-welds. A jig would need to be made. For a spot weld it would be best if the elements were of the same alloy as the centre wire.
I'd never seen one of these before. The approach to wave mechanics we got was jumping straight in mathematically with no attempt at visualisation. The only people who 'got it' were those who could work it out for themselves. David
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Can't afford the volcanic island yet, but the plans for my monorail and the goons' uniforms are done |
21st Nov 2014, 2:38 pm | #9 |
Retired Dormant Member
Join Date: Jan 2011
Location: Egham, Surrey, UK.
Posts: 219
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Re: Wave Motion
Exactly the same here David. Such clarity provided by these machines. Let us know how your build project goes. You could try epoxy glue instead of spot welding.
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21st Nov 2014, 5:45 pm | #10 | |
Guest
Posts: n/a
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Re: Wave Motion
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21st Nov 2014, 7:54 pm | #11 |
Retired Dormant Member
Join Date: Jan 2011
Location: Egham, Surrey, UK.
Posts: 219
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Re: Wave Motion
I can see a lot of creativity going on here. I will join in the fun once a few other projects are put to bed. What have Lawrence and AT&T started ??
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21st Nov 2014, 8:24 pm | #12 | |
Guest
Posts: n/a
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Re: Wave Motion
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