MOTION MOUNTAIN

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Light, Charges and Brains Inourquesttolearnhowthingsmove, theexperienceofhiking andothermotion leadsustodiscoverthatimagesareproducedbycharges, thatchargesmove,accumulate andinteract, andthatthereisasmallestchargein nature. Weunderstandwhatlovehastodowithmagnetsandamber, whythebrain issuchaninterestingdevice, andwhatdistinguishesagoodfromabadlie.
Chapter 1 LIQUID ELECTRICITY, INVISIBLE FIELDS AND MAXIMUM SPEED Vol. II, page 81 Vol. I, page 218 Challenge 2 e Ref. 1 What islight?Thestudy ofrelativity left us completelyin thedark, even though e had embarked in it precisely to find an answer to that question. True, e have learned how the motion of light compares with that of objects. We also learnedthatlightisamovingentitythatcannotbestopped,thatlightprovidesthespeed limitforanytypeofenergy,andthatlightisourmeasurementstandardforspeed.However,we haven’t learnedanything about thenature oflight itself,norabout colours,nor abouthowraindrops,*andothermatterproducesthem. A secondquestionis open:whatis contact?We still donotknow.In ourexploration ofrelativity weonly learnedthattruly mechanical interactions donotexist. Welearned thatall interactions,alsocontact,areduetoexchangeofparticles.Butwhichones?And howcanmotionandlevitationoccurwithout anymaterial contact? Athirdquestionalsoarises:howdowesensecontactortouch?Whataresensorsand howistheiroutput,thedata,processedinthebrainorinmachines?Notonlythebrain, alsoallotherdataprocessingsystemsuseelectricity.Whatisdataandwhatiselectricity? The answer to the questions about the nature of light, contact and the brain is not related to gravitation. If we make a list of motors found in this world, we notice that gravitationhardlydescribesanyofthem.Neitherthemotionofseawaves,fireandearthquakes,northatofagentlebreezeiscausedbygravity.Thesameappliestothemotionof muscles.Have you ever listened to your own heartbeat with a stethoscope? (Or use, as manymedicaldoctorsdonow,an MP3playertorecordyourheartbeat.)Withouthaving done so, you cannot claim to have experienced the mystery of motion. Your heart has about3000million beatsinyourlifetime.Thenitstops. It was one of the most astonishing discoveries of science that heart beats, sea waves andmostothercasesofeverydaymotion,aswellasthenatureoflightandthoughtitself, are connected to observations made thousands of years ago using two strange stones. Thesestonesshowthatallthoseexamplesofmotionthatarecalledmechanicalineverydaylife are,withoutexception,ofelectricalorigin. In particular, the solidity, the softness and the impenetrability of matter are due to internalelectricity.Butalsotheemissionoflight,theformationofcoloursandtheworking of our nerves andbrains are due to electrical processes. As theseaspectsare part of everydaylife,wecanleaveasideallcomplicationsduetogravityandcurvedspace-time. Themostproductivewaytostudyelectricalmotionistostart,asinthecaseofgravity, * The photograph of a circular rainbow on page 14was taken in 2006 from the Telstra Tower in Canberra (©OatVaiyaboon). Motion Mountain – The Adventure of Physics copyright © Christoph Schiller June 1990–November 2015 free pdf file available at www.motionmountain.net
Page 1: ChristophSchiller MOTION MOUNTAIN t
Page 4 and 5: Editiovicesima octava. Proprietassc
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Page 8 and 9: 8 preface PHYSICS: Describing motio
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Page 12 and 13: 12 contents Do we see what exists?
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Vol. IV, page 231 Chapter 2 THE DES
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Chapter 3 WHAT IS LIGHT? Ref. 57 Pa
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96 3 what is light? Electric field
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108 3 what is light? Challenge 110
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110 3 what is light? incoming light
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112 3 what is light? Ref. 70 Challe
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114 3 what is light? F I G U R E 69
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116 3 what is light? light Ref. 72
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Chapter 4 IMAGES AND THE EYE - OPTI
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Chapter 5 ELECTROMAGNETIC EFFECTS R
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236 7 the story of the brain F I G
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238 7 the story of the brain Vol. V
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240 7 the story of the brain TA B L
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242 7 the story of the brain consci
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248 7 the story of the brain Vol. I
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254 7 the story of the brain ∗∗
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Chapter 8 THOUGHT AND LANGUAGE Ref.
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Chapter 10 CLASSICAL PHYSICS IN A N
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362 bibliography 10 Thiseffect hasf
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364 bibliography 37 A discussionof
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366 bibliography M.B. van der Mark
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368 bibliography Vol. I, page 96 19
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370 bibliography S.W. McCuskey, F.C
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384 bibliography and 304. 260 For a
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386 bibliography Springer, 1996. wh
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CREDITS Acknowledgements Many peopl
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NAME INDEX A Abbott A Abbott,T.A.37
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396 name index D Democritus Democri
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398 name index H Holmes Holmes, C.D
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400 name index M Mohr Mohr, P.J. 38
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402 name index S Sheldon Sheldon, E
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404 name index Z Zybin Motion Mount
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406 subject index A units 328 Aplys
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408 subject index C classical class
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410 subject index E Earth Earth age
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412 subject index F finite finite 2
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414 subject index I infrared photog
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416 subject index L Lorentz Lorentz
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418 subject index M motion motion a
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422 subject index S Scarabeus Scara
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424 subject index T table d’Unit
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426 subject index W Wien’s Wien
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