THE<br />IPod<br />
How does it work ?!?!<br />
HOW IS IT SO SMALL?<br />
WHERE DID ALL THE INFO GO? <br />IT’S NOT BACK HERE!<br />
160GB<br />=160 X 10^9<br />bytes<br />
THAT’S MORE THAN THE NUMBER OF HUMANS WHO HAVE EVER BEEN ON THE FACE OF THE EARTH… EVER!<br />IN HERE<br />http://www.prb....
IF EACH BIT WAS A RULER<br />AND YOU TOUCHED THEM END TO END. <br />http://neo.jpl.nasa.gov/glossary/au.html<br />
YOU COULD TOUCH A STAR IN THE CONSTELLATION<br />CENTAUR! <br />http://www.astro.wisc.edu/~dolan/constellations/constellat...
AND STILL HAVE ENOUGH TO BUILD A BRIDGE OF RULERS TO PLUTO THAT WOULD BE 1,642 RULERS WIDE.   <br />http://www.physlink.co...
AND THEN SOME,<br />ALL IN THE BOTTOM HALF OF THE IPOD<br />
?<br />?<br />HOW DO THEY DO IT? <br />?<br />?<br />?<br />
GMR<br />ACRONYM= BIG CONFUSING WORD <br />GIANT MAGNETORESISTANCE<br />SCREAMING IS APPROPRIATE<br />
SIMPLY<br />Let’s think about a sandwich<br />
THE BREAD IS MAGNETIZED IN THE SAME DIRECTION, THE PB&J IS NOT<br />
NOW, THINK ABOUT SHOOTING ELECTRONS THROUGH THE SANDWICH!<br />e- e- e- e-<br />e- e- e- e-<br />e- e- e- e-<br />e- e- e-...
ABSTRACT IDEA WARNING!!!<br />OK, SO ELECTRONS HAVE THIS THING CALLED SPIN. <br />http://www.ahajokes.com/cartoon/sharp_ed...
KIND OF SIMILAR TO A TOP, <br />THEY SPIN, BUT NOT ALL IN THE SAME WAY. <br />OB<br />
SOME WILL SPIN IN ONE DIRECTION   TO THE MAGNETIC FIELD <br />OTHERS WILL SPIN IN ANOTHER DIRECTION TO THE MAGNETIC FIELD<...
THE ANTI- PARALLEL <br /> THE PARALLEL <br />
THE TWO PIECES OF BREAD ARE MAGNETIZED IN THE SAME DIRECTION  <br />NORTH <br />TO <br />NORTH <br />SOUTH <br />TO <br />...
THE ELECTRONS THAT ARE PARALLEL WILL PASS THROUGH WITH LITTLE RESISTANCE <br />SOME OF THE ANTI-PARALLEL ELECTRONS WILL WI...
BUT WHAT IF YOU FLIP ONE SIDE OF THE SANDWICH UPSIDE DOWN? <br />N<br />S<br />S<br />N<br />
THE TOTAL RESISTANCE WILL BE HIGH <br />WHY?<br />http://mylifecomics.files.wordpress.com/2010/02/confused-face2.jpg<br />
THE MAGNETIC FIELD DEFLECTS BOTH TYPES OF SPIN <br />FEWERGO THROUGH THE SANDWICH <br />
It is very similar to a goalie on his game <br />Except the pucks are electrons <br />http://2.bp.blogspot.com/_VrRxdJj53J...
But in a parallel field the goalie might be having an off night<br />http://www.boston.com/community/photos/raw/davis_goal...
YOU CAN CHANGE THERESISTANCE OF ELECTRONS COMING OUT OF THE SANDWICH <br />IN ENGLISH!!?!? <br />
If you can change it <br />You can control it <br />http://sciencegeekgirl.com/files/2008/07/641px-mad_scientist_transpare...
HOW DOES THE I POD FIT INTO THIS ? <br />A BETTER QUESTION IS, HOW DOES THIS FIT INTO THE IPOD? <br />http://irononstation...
With special sensors, and using GMR effect, a computer is able to read tightly packed information on hard disks. <br />THA...
1981 vs 2010<br />
2010<br />1981<br />; http://www.techrivet.com/resources/images/GigabyteComparison_20yago.jpg<br />
Without GMR the IPod would be about the size of a truck <br />Plus that giant rock. <br />http://farm4.static.flickr.com/3...
You can thank : Albert Fert<br />http://www2.pictures.gi.zimbio.com/Nobel+Prize+Winners+Honoured+Elysee+Palace+0iwkxqDKptA...
&<br />Peter Grunberg<br />http://nobelprize.org/nobel_prizes/physics/laureates/2007/grunberg_museum_photo.jpg<br />
The 2 who discovered the GMR effect <br />With out them life sure would be different. <br />Cave man IPod<br />IPod<br />h...
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The Physics of the IPod

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The Physics of the IPod

  1. 1. THE<br />IPod<br />
  2. 2. How does it work ?!?!<br />
  3. 3. HOW IS IT SO SMALL?<br />
  4. 4. WHERE DID ALL THE INFO GO? <br />IT’S NOT BACK HERE!<br />
  5. 5. 160GB<br />=160 X 10^9<br />bytes<br />
  6. 6. THAT’S MORE THAN THE NUMBER OF HUMANS WHO HAVE EVER BEEN ON THE FACE OF THE EARTH… EVER!<br />IN HERE<br />http://www.prb.org/Articles/2002/HowManyPeopleHaveEverLivedonEarth.aspx<br />
  7. 7. IF EACH BIT WAS A RULER<br />AND YOU TOUCHED THEM END TO END. <br />http://neo.jpl.nasa.gov/glossary/au.html<br />
  8. 8. YOU COULD TOUCH A STAR IN THE CONSTELLATION<br />CENTAUR! <br />http://www.astro.wisc.edu/~dolan/constellations/constellations/Centaurus.html<br />
  9. 9. AND STILL HAVE ENOUGH TO BUILD A BRIDGE OF RULERS TO PLUTO THAT WOULD BE 1,642 RULERS WIDE. <br />http://www.physlink.com/education/askexperts/ae498.cfm<br />
  10. 10. AND THEN SOME,<br />ALL IN THE BOTTOM HALF OF THE IPOD<br />
  11. 11. ?<br />?<br />HOW DO THEY DO IT? <br />?<br />?<br />?<br />
  12. 12. GMR<br />ACRONYM= BIG CONFUSING WORD <br />GIANT MAGNETORESISTANCE<br />SCREAMING IS APPROPRIATE<br />
  13. 13. SIMPLY<br />Let’s think about a sandwich<br />
  14. 14. THE BREAD IS MAGNETIZED IN THE SAME DIRECTION, THE PB&J IS NOT<br />
  15. 15. NOW, THINK ABOUT SHOOTING ELECTRONS THROUGH THE SANDWICH!<br />e- e- e- e-<br />e- e- e- e-<br />e- e- e- e-<br />e- e- e- e-<br />-----<br />-----<br />BUT WHAT HAPPENS IN THE SANDWICH? <br />
  16. 16. ABSTRACT IDEA WARNING!!!<br />OK, SO ELECTRONS HAVE THIS THING CALLED SPIN. <br />http://www.ahajokes.com/cartoon/sharp_edges.jpg<br />
  17. 17. KIND OF SIMILAR TO A TOP, <br />THEY SPIN, BUT NOT ALL IN THE SAME WAY. <br />OB<br />
  18. 18. SOME WILL SPIN IN ONE DIRECTION TO THE MAGNETIC FIELD <br />OTHERS WILL SPIN IN ANOTHER DIRECTION TO THE MAGNETIC FIELD<br />www.pepperspollywogs.com/blog/wp-content/uplo<br />
  19. 19. THE ANTI- PARALLEL <br /> THE PARALLEL <br />
  20. 20. THE TWO PIECES OF BREAD ARE MAGNETIZED IN THE SAME DIRECTION <br />NORTH <br />TO <br />NORTH <br />SOUTH <br />TO <br />SOUTH <br />
  21. 21. THE ELECTRONS THAT ARE PARALLEL WILL PASS THROUGH WITH LITTLE RESISTANCE <br />SOME OF THE ANTI-PARALLEL ELECTRONS WILL WILL BE DEFLECTED, BUT OVERALL LOW RESISTANCE <br />N<br />N<br />S<br />S<br />
  22. 22. BUT WHAT IF YOU FLIP ONE SIDE OF THE SANDWICH UPSIDE DOWN? <br />N<br />S<br />S<br />N<br />
  23. 23. THE TOTAL RESISTANCE WILL BE HIGH <br />WHY?<br />http://mylifecomics.files.wordpress.com/2010/02/confused-face2.jpg<br />
  24. 24. THE MAGNETIC FIELD DEFLECTS BOTH TYPES OF SPIN <br />FEWERGO THROUGH THE SANDWICH <br />
  25. 25. It is very similar to a goalie on his game <br />Except the pucks are electrons <br />http://2.bp.blogspot.com/_VrRxdJj53Js/SYXgP_C7p3I/AAAAAAAABKs/m8Eow4obCrQ/s1600/S0131no_call_w.jpg<br />
  26. 26. But in a parallel field the goalie might be having an off night<br />http://www.boston.com/community/photos/raw/davis_goalie.jpg<br />
  27. 27. YOU CAN CHANGE THERESISTANCE OF ELECTRONS COMING OUT OF THE SANDWICH <br />IN ENGLISH!!?!? <br />
  28. 28. If you can change it <br />You can control it <br />http://sciencegeekgirl.com/files/2008/07/641px-mad_scientist_transparent_backgroundsvg.png<br />
  29. 29. HOW DOES THE I POD FIT INTO THIS ? <br />A BETTER QUESTION IS, HOW DOES THIS FIT INTO THE IPOD? <br />http://irononstation.com/Merchant2/graphics/thumbs/ironon/spiritual/spiritual4.jpg<br />
  30. 30. With special sensors, and using GMR effect, a computer is able to read tightly packed information on hard disks. <br />THAT MEANS MORE INFORMATION IN A SMALLER SPACE! <br />
  31. 31. 1981 vs 2010<br />
  32. 32. 2010<br />1981<br />; http://www.techrivet.com/resources/images/GigabyteComparison_20yago.jpg<br />
  33. 33. Without GMR the IPod would be about the size of a truck <br />Plus that giant rock. <br />http://farm4.static.flickr.com/3478/3458191128_bbc3b9745f.jpg<br />
  34. 34. You can thank : Albert Fert<br />http://www2.pictures.gi.zimbio.com/Nobel+Prize+Winners+Honoured+Elysee+Palace+0iwkxqDKptAl.jpg<br />
  35. 35. &<br />Peter Grunberg<br />http://nobelprize.org/nobel_prizes/physics/laureates/2007/grunberg_museum_photo.jpg<br />
  36. 36. The 2 who discovered the GMR effect <br />With out them life sure would be different. <br />Cave man IPod<br />IPod<br />http://jelinek-art.cz/images/vedecke/vr020.jpg<br />

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