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The one thing that prevents them from entering customer market in every day use is that magnets can affect many things. Simple example - I had cover for my pho

by funkyy 11y ago

The one thing that prevents them from entering customer market in every day use is that magnets can affect many things. Simple example - I had cover for my phone with a magnet closure. It wasnt affecting my phone in any way, but few times I put parking card next to it and it wiped out all the information from it forcing me to chasing parking office to get it re-printed.

function_seven 11y ago
But wouldn't this be the solution to your problem? If the pole reversals are tightly packed, it looks like the field lines could be designed to not affect other objects, even in close proximity.
- funkyy 11y ago
  As long as facing right direction. Its just one example and actually quite good - I would keep initially the ticket inside of the case, so it would come close to magnet anyways.
bigger_cheese 11y ago
When I was at uni we spent some time in the lab playing around with Magneto-optical film and polarized light, it was supposed to demo the Kerr Effect. I had fun with an old floppy disk - you could bring a bar magnet close to the disk's film and watch the magnetic domains flip under the microscope. Would be pretty cool to print some patterns using this technology and view it the same way.
- pdkl95 11y ago
  > Kerr Effect Applied Science (which has many great videos) recently did that demonstration using an old magneto-optical removable disk. He was able to get a very nice example of the effect that is visible with the naked eye. https://www.youtube.com/watch?v=UTquUbvzJII https://www.youtube.com/watch?v=UTquUbvzJII If you like that video, the previous video on the Faraday effect is really cool; I had no idea a solenoid rotates light polarization. https://www.youtube.com/watch?v=XhU-nNiAgtI https://www.youtube.com/watch?v=XhU-nNiAgtI
fezz 11y ago
Supposedly this reduces the distance to affect sensitive electronics/cards.

by funkyy 11y ago

function_seven 11y ago

But wouldn't this be the solution to your problem? If the pole reversals are tightly packed, it looks like the field lines could be designed to not affect other objects, even in close proximity.

funkyy 11y ago
As long as facing right direction. Its just one example and actually quite good - I would keep initially the ticket inside of the case, so it would come close to magnet anyways.

bigger_cheese 11y ago

When I was at uni we spent some time in the lab playing around with Magneto-optical film and polarized light, it was supposed to demo the Kerr Effect. I had fun with an old floppy disk - you could bring a bar magnet close to the disk's film and watch the magnetic domains flip under the microscope. Would be pretty cool to print some patterns using this technology and view it the same way.

pdkl95 11y ago
> Kerr Effect Applied Science (which has many great videos) recently did that demonstration using an old magneto-optical removable disk. He was able to get a very nice example of the effect that is visible with the naked eye. https://www.youtube.com/watch?v=UTquUbvzJII https://www.youtube.com/watch?v=UTquUbvzJII If you like that video, the previous video on the Faraday effect is really cool; I had no idea a solenoid rotates light polarization. https://www.youtube.com/watch?v=XhU-nNiAgtI https://www.youtube.com/watch?v=XhU-nNiAgtI

fezz 11y ago

Supposedly this reduces the distance to affect sensitive electronics/cards.