Table Of Contenton
AitomkP hysics
andH umanK nowledge
1963
INTERSCIENPCUEB LISHERS
a divisoifJo On HWNIL E&Y S ONS
NewY orkL·o ndon
NielBso hr
on
AtomiPch ysics
andH umanK nowledge
COPYRIGH1T9©6N 3I EBLOSH R
Alrli grhetsse rved
LIBRAROYFC ONGRCEASTSA CLAORGND U MB6E3R- 21771
PrintienGdr eaBtr itabiyRn i chaCrldaa yn dC ompanLyt,d ,,
BungaSyu,ff olk
Preface
hep resevnotl umweh,i cfohr msa s equetlot woe arliceorl lections
T
ofe ssaycso,n1t aian nsu mbero fa rticles wbryi NtiteelBnso h r
duritnhgle a sfivte y earosf h isl ifeT.h ep lanfosr thea ppearaonfc e
thep resecnotl lecwteiroemn a deb ym y father somea gtoia,mn ed t he
publicawtaisoa nw aitionngl tyh efi naclo mpletoifot nh ea rtei Lclight
anLdif Ree visiTtheev dol.u mies n owb einpgu blishweidt thh ei n
clusiooftn h eu nfinishmeadn uscroifptt h iasr ticle.
Them aint hemoe ft hfier sfotu re ssamyasy b es aitdo b ea ne labora
toina ndfu rthedre velopomfet hne tge nervaile wpoidnetssc ribiend
thee arliceorl lectiIotmn asy.t herefobreea ppropritaoqt ueo tteh e
followipnags safrgoem thea uthoro'wsn i ntroducttoit ohnep revious
volume:
The importanocfep hysicsacli enfocre thed evelopmeonftg eneral
philosophtihcianlk irnegs tnso to nloyn i tcso ntributnisto oo urs teadiinly
creasiknngo wledogfet hanta turoefw hicwhe ourselavreesp artb,u ta lso
ont heo pportuniwthiiectshi maen da gaiinth aso fferefdo re xaminatainodn
refinemeonfto urc oncepttuoaoll sI.no urc etnuryt,h es tudoyf t hea tomic
constituotfmi aotnt ehra sr evealaenud n suspecltiemdi tatoifto hnes copoef
1N .B ohrA,t omic Thaenodrt yh eD escriptofiN oant ureC,am bridUgnei ver
siPtrye s19s3,4 ·
N.B ohrA,t omiPch ysiacnsdH umanK nowledgJeo, hWni le& ySo nsN,e w
Yorkl,9 58. KANSCAISTY (MO.L)I BPRUABRLYI C
v
5,co
vi PREFACE
classiphcyasilca li deaasn dh ast hrownne w lighotn thed emandosn
scienteixpfilca natiinocno rporiantt erda ditipohinlaoolpsh y.T her evision
oft hefo undation forth eu nambiguoaupsp licaotfio ounre lementcaorny
ceptnse,ce ssaryfo r comprehensoifoa nt omipch enomenthae,re foreh asa
bearingfa rb eyondt hesp ecaild omaionf p hysicsacli ence.
The first deessscaryi tbheeos b svearitonals ituaitnqi uoann tum
physicsa ndth en otioofnc omepmlentaMryi fattyh.fee lrt tihnat thi,s
litatrlctelih ee,h ad cseuecdienfod r mluaitng somoef th e sseentila
pointsm orec learlcyon cainstdeh layon n e arloiccears i.o ns
Int hes econadt ricle,t hec omplmeentraya pporacht opr oblmeso f
psyhoclogy anodci osglyoi sde altw itihn m ored etaAil p.sa safgreo m
aD aninsohv wehli,mc yhf athhaebdree nv erfoynd offr omh iysou th,
is utsoei dl lusat srypcahotlogeic alsi tuatiinwo hni ccho mepmlentary
realtionshipsa rceon spicuous.
Thet wofo llowipnapger se nteornt hreel taoinship betweenph yscsi
anbdi olowghyic,h t hrought hey erash asd eeplyi ntermeysfa tteherd,
anwdh ichhe fi rsdti scuisnts heead dd reLsz'sg ahntd frLomif 1e9 23,
incluidnte hpdere viousv olumeH.e feltth asto meo fh irse amrks
fromt htat imhead n ota lwabyeesnp r operly interpreted,a nhde w as
anxoiust og ive ana ccooufnh tiv sie wsa st hehya dd evelospneicde
theni,np artircu unldaethre stimluaotnio ft hger enaetw d iscoveries
inth e fielodfm olecularw hibchi hoelh oagydfo ,l lowwiedts hu ch
enthusisma.
Thes ubjtei cstou cheudp on thient hiradr ticwlrei,t tienn1 906,
butm y fatherw ash opnig tot akuept hequ estoini na omre detailed
paper boansae l de ctuhred ee liveirnCe odl oeg niJnu ne1,9 26,w ith
thet itlea nLLdigif heRt e visitHeodwe.v esrh,or tlya tferwahred s,
becaimleal n,ad lt hough hew asw eloln h iwsa yto r ecovery andh ad
resumwoerdko nt hea rticilwtea ,sn otco mpleted whenh ed ied, sud
denloy,nN ovember1 8th19,6 2.
Hel efamt a nuscrwihpihtch eh apdre paerda sab asfoirts h el ecture
inC oloagndn ienw hichhi vsie wso nt here laitonship betwene hpyscsi
and biology aree xpounded ins omewhatg readteetrta hialin nh is
earlairetrei s.c lIti sho,w ever,on lwyi tcho nsiderable hesittahtaito n
thimsa nuistpci rsb eipnugbl isdh.eT hosefa milwiiatrmh yfa ther's
wayo fwo rkwiinklgnl o wwh agtr eeaffto rhteds e vottoet d hper epara
tioofanl hli sub lipctianos. Thet exwtou lda lwabyers e -wrmiatntye n
timwehsie l the mattrew ase inbg graudally elucdiadt,e nda until a
properb alanwcaes a chievienthd e p resenotfi atvtsai roinao supse cts.
Althouhg ag redaetao lf w orkh adb eednon e ont he prsenetm anu
scrip,ti tw ass tfairl frlom complne.tI tih oasn everltehsebse ein n
clduedi nh e ptresveonltu bmceea,u osfteh ei nterwehsitc aht taches
PREFACE Vll
tot hev iewist c ontaibnust,t her eader musti nbm eianrdt hep re
liminary choafrt ahcetifoerrr m ulatioWni.t hr egartdoa f ewp assages
containing coommnse pnetcsi bfiico logipcraolb lemtsh,ea uthohra d
plannemda jorre visions. paTshseasgehe asv et herefobreee no mitted
from thet extt;h eisru bstanicsie n dicaitnen do teisn sertiensd m all
print.
Thel astth reaer ticilnet sh ev olumdee scrivbaer iopuhsa seisn t he
developmoefna tt omipch ysiacnsd q uantum thienot rhyec onteoxft
personraelm iniscenFcreesq.u entilnyt ,h ec ompanyo fc olleag, ues
botho ldearn dy oungemry, fatherw oulde njorye callhiinsgv ivid
memorieosft heo ftednr amatic events waistshto hceio artiegdi n and
graducalla rificaotfti hoenn e wi deasT.he p reparatoifto hens ear ticles,
writtfeonrv ariosupse cioaclc asiolnesdh, i mt oe xtenshivies torical
studibeysw ,h ichh ew oulds upplemehnitso wnm emoryb yh isr ich
personcaolr respondfreonmc et hep erioidnsq uestiaosn w,e lasl by
thep ublishseodu rceTsh.e w orko nt heR utherfoarrdt icelxet ended
ovesr everayle ardsu,r inwgh ichh ec onferrweidt ha largneu mberof
colleagwuheosh adp articipiantt ehded evelopmecnotnsc erned. Al
thougthh esteh relea spta perasr eh istoriincc ahla rac,tt ehreya tt he
samet imgea vme y fathetrh eo pportuntioet lyu cidfraotme n ewa ngles
theg enervaile ws whfoircmh t heb asict hemeo ft hep resenats w ell
aso ft hep reviocuosl lectoifoe nsss ays.
Int hep reparatoifto hne a rticlmey sfa,t hewra sa idebdy J0 rgen
KalckaAra,g eP etersaennd E rikR i.idingeHre. woulda lshoa ve
wishetdo e xprehsiss a ppreciaotfit ohne e ffective ohfeM lrps S.
Hellmann.
AAGE BOHR
Copenhagen
MayI963
Contents
QUANTUMP HYSICASN D PHILOPSHOY-CAUSAL-
ITYA ND COMPLEMENTARITY 1
ContribtuoPt hioinlo sionpt hhyMe i d-Cenetdub.yr y,
R.K libanLsakN yu.o vIat aEldiiat rFilocreec,ne, 1958.
THEU NITYO F HUMAN KNOWLEDGE. 8
Addreatst sh Ceo ngrienCs osp enhaOgcteonb,e1 9r6,0 , •
arranbgyLe adF ondaEtuiroonp deeel naCn uel ture.
THEC ONNECTIOBNE TWEENT HES CIENCES 17
Addreastts h eI nternaCtoinognroaeflsP sh armaceutic
ScienicnCe osp enhaAgugeun1s,96t ,0 .
LIGHTA ND LIFER EVISIT.E D 23
Addraetst hsie n auguorfat thIieno snt ifotrGu etnee tiinc s
CologJnuen1,e96 ,2 U.n finishmeadn uscript.
ix
