Table Of Contentffi
ffi
ffi
i&#
e
owg
#
\ei
ffi{T
IR$IT
ffiIr{4 Tqqr{
"TH
t;
-a<-<ru
Q",-r*rl
ffi.**
qfr$rd
firg,rftrq"{ ccat
{l{
C{TtrI TAIr{
E{n qTFf : ioo5
ftfrl q5l : tool
ufta X5"t : \ole
EFTII$
<"frFql
b <I".EFflEi]lI
OTI-))oo
SDSR'
frlld{ft
.
g.t
6{{r&rff
.9oll qrIE nH (?lv, ,l-<tMoo
$r: )qo fi<tl$4
BIGHANEDER SHERA ABISKAR A BOOK AbOUt SCiNCE ANd
Scientist by Sohel Rahaman Khan. Published by Fazlur
Rahman Khan. Bamabichiaa, 9 Banglabazar, Dhaka 1100.
Phone r01815t544e0. Price : Tk.120.00 Only
ISBN: 978-8167-20-7
6q,F
a{
al(qrm6.r< fiEr{
fu.nr-fuffirn{qql
{f{sBT
REar+ {ft
q'fft,t5-{q/
oa
fiffi
e'tfr[tr{m / )c
uFfuvntQq i \e
qtqtl?FfrEi-{ e)
{Jt-* /
qfrfrG-q
/ eq
crffi{lfqlirat{i
cs
sffifrs'fffi
ql
/
aEETft/u:
q.'tft{5q{{
q{
: )bc} : )beq
lET
Rqr ow <td calq urgr Eore-o <r<
frfrqa\wwqel4, frrwqwt
qfc-'tlqtfre W cq{
tq{fiqr{ E?Fr Qqrtrqrq< <tqq r frt {'Trr< Tcll <eR r rv{6ffi
qs 6qrq .|{r< q(El r vfti qrfl ficwqn 1m r c<fci-rt tro
r
6{#c-s< {<lt Et{ cE-cl 111-6{ <V r rtrsi Tlils rlcelt Fr;l sFt
srcE#lt cqi qceB<
T(Es fii qrql rqr<i eL{ {lr{3-{{Eq'-< cqr{ r 6{tB €fi {rsl
cq'{ qI \3rs I q3r ot|st or<i <t mq r ql-g otrcr< qrq,4 qirn
8rr<& frrtrs, 1I qEr ({cs r otrsl W sR stctt cRaR {{ {l I
frrorq c$tqw qrt entistdsFTfi
"r{,
r
c&l'{fts ft,,{]T celrs qFfl cqrqtl< et -r{<tre smt Ercrt
ql r ceftiT cqmi rr{q qtr, fi-q q]$Ff cqrrl qNi{ I c't$F qcsitd
qtqll{ c$A 1fr qrqI r qls q-"ffi|d fu EI-$'l | :rfc{ {trc (l<l
't-rFfl<
cq Btq "nln sl c{rs 6{ ftg ftC FI< qff{r I ETit"i< cqt qft-{
"nrfl firl "rR cccq, tm <rrm r figl trCq th-{ 6q-qt ffi{F 1 qrfi-{
cc ({ rcl(t-c{ allcs, sl-< qF{r{< qfr TPiI{ F[q< {'F ?e-R r-<r{I
{,r< eFfi {{l{ r 'ilfr{ "nQ,i ilTI Fm 4ql slh <t'fl6 "ilfr
cqrF qcdl | {rB(g "IIfi-< oB crlre {T I ql< mi a'r+< qF qE fi{
ql
eon<-str< qcg?'c-fr cqB e$it ir6el
r
"rlfi< cEE qF qTmt-c{.t T$ "m arqF r of "nfi-< oE qN
{rfl q-s q6qrr$ gft.n frm <ta
ft slt,(il{kt BbR'iIfr gtrrq r "rlfi qr<r< csltt c$'l"I Trn ?
e[fr-{ ft q16q es ifl1q I i{at6 ffi {&] "i-ffi <r< gl1q
q{g-"q11m ? fuc< \oMT ald r et q? E-{q{fur, qi
<-g 'tG,
cuB etit r< @ 6$'ir;t r{Tfrn!
fr-q sF r csrffFTtll cqi *ql qro +Q-s qc{ {<t mr cqrqF<
qn I -Rl eRfft {ffirarr qrqiR c?]fl{K qF qrq C{{ $[ fiir
I
{fi
Erttr+< eo csl[6t qF {6{ cc erf&rs syq mq 6qq-< n?t pr<
eFft-{ 6{C{fr <\e {r{T-qfl{ W I El-{ C"rErqrr< qmffir
{F[m
m{Itrt flfal, rtTS, {r{ {<Q etFE[6[ I .c(( .sr{ T{ml
'|ts,
qffi${Tq{-T-qt
I
qEfuT r-gi *q fte Fft-r sTG sr. {65H srfl, {l E{ {l?, st
qffilfr-$F
I
6{ qt qr{E, mnfi rct<l(4[cqrlnfr-+'q"I-fiilD"fiqdt"rq<
qs @r{--nl{ 6F q1ft1 u-g <-1
r
cc? :ucq {r{ 6{ sqr fr"fIQ RER qrqt r trrtrqm< ft-rr6
frctts sw {rqt r sT< .4F <q-< *t qqfiq )ucu qIrFK eo ;Ir\e-{<
qotft,t ug ${n qT, ft-q{"Id ,F IqR nE{]-{ Slc{ I <Fil E j?II{ D-S
<1Qrm+Rn'g<< cstBfl&dE
r
sn<lT Dl'U< <qftd n-tft r qlq ql116q, Fldl m$r{ | 6q[E ?iVr< I
ft-q cq.m lv,l-r<{ ? t<r<& pn tre r{ r 6+ o-+cqq 'itrr<
fu-{ qtfti-re-fit ft
<tsEt "wtr+q r TIfu cdr{t, ctfrr{R ccr{
ql <l(El 'llt{Frt{ ivr1 I ft-E Prq v'Rr{ xg< ftnts cqr{ csu
€tr+ c-{to ql r sr& ca,'rs "flhr+ qq sBR TM r cq[q
"n-?rrqI
qutft't r-g cotrqsl< iEq E(_s {r{ m ql[c r ifln c'lltrg]bl cs frE
qrr{l ? qsq-{ csEI qrgl etl€Tl sliFlE r ot<lq r-{t cq-q 6s-fl
\trstElr q-{qF q{qk Fa[ ar{ EIc{ sl-?t <FIk F'kq {{rqT I q
6r1F-sE q{ft{ Etra ql{-C{s{I F(3 {slq frrEFI r cfiil Tlsl 51fi
e{ rslTlEbtsk6-<r{<qfuaaaqrfg 6{mn
1
ttft< erq, qrq-l]fiR qrq q"fft,t Ers< qm "n'{Hls "l[v
I
<1{< qq1fr{ er{s Ef< cr{ {5-lIeI.{ TN I Effl {rE,fia6q66
'ffl I {rfi Erq qrE frqcst <I"K s,|q EM C{ 4l r <Fn\3 e-Ir+ Tfrq
fim <cql r ,nilfrq ffi ER lGrs nE Ei qrc alr{r'ct, c{ sR
<mfco erbR t< csBt qi sr{ crFl-qlt c<rq qs I sil col qr I
<t<t fr{s qcq{ it r erslsB srx< {trcl dB,cs s-{F frcg{ r qir
qfi
Git qf+l er{-651 qt, qqreq, cA qrfr 4l I qrdr r]tq frrq<
g
q6sl qqf &fi qFF{,,
fun:F-?IF srRf{ ES C"r(E;t nl I SFq
qrs Fr{ csffi< qFKI< i{lifiw qr{\3 6w <lK I T{l {l{, ql{Q
&c-+* qtft,t um< ftsm{ qaE ftTle*
r
ertr++ cqnri qutfit't rg Ar-fl cfi-g€ fiq 1 {-flfu <t6q
q{rt ffi
1"t Erq <m atFrr{ cucl Q-<-W ("lTlt, :ir+ cqrfi, <uttrq
F{d qttFl
ffi'|.]-c{, mgx u-e c<-v'tint celf,t sr< vrrfl 6<Ft r
qr:rF {fi slit <rH dq ft ffi cr{ 6sl-sF lM cx"t
"Irrr.3l
q'tft{
qlT ft({ {tE'tF <s Fna eHiE EFte <fiQn A1''fl< Eg
T{. I s{ io"rq cc l]-Egmfr r frrq cot E;ffi, cqtqtn+rg drq
(srqfisR"Fq9lW+tffifM5grsfisrt
y4Fil I 6c (arcs r
cI{v65
skrir 6ryqqcilqtftqugr{r lq<r<qqiFlsl
"fgl
cc+ ffiGflr{ IrE I q6q TGrq< crcal c$fq 'rH +m sF q{ c{B
mGxF( <'rqffi r )blu cIrq et sffiq c{rs qr. q. 'f't sln;t
ffi csMsfi ffi qfilqfl
r ccB ft.e. Fnm Erq s"lqe sr<
qnqFft
eF-ffir ffi gft\5 ctft'{-{ qwcc c{gl[s; 6a{'6a ({Ffr"{ qT{E
frrl qqre cstrq{ Fl+rn F{rs r qhsqcslql'ftq cirl q< ,r+ sm r
oqfi6oerqf &frftr<qnaq
r
ri'rq C.Flan€ ffift 61 r R6s {ts{I IBI T{ r qTffi cltq-n
YFI 31sl rgqrgffiigqcl ercIq
r
(q]g] qrit 1]sfl ('rdr r foE cqqil flrstfuF r<xligl r {lq
frqfi-{'qft{ q+qq cerrftrs mrq frcl cl''c< cefir< cslofl9
o<Eq r cqt calr+ 6s1v1iTcs r+6uryqr rq{ftlrgrorg.h csMcg
oi
ovcofrrqqs-fiqtr<tt rftV m c.ll6 6{frc<q r c<rM mM<
s"r<t q<'tftc< cu'c"t qa5a1 q1fu I EIr{ qr{ {ffi 6sM <;l-3t{V
(grc{ry<r{C'ts(ge$$-:ffif
ltqni qa qft r qfu <tc< o1 t*< lqfi c{ slst eil q'tftrfi
qm E{ ql r Cs1vrar Emn 6rr {frtr c{<t< 'r< 9l {qr{ 1vffil I
w"m e+! qc< qrtT 4s--{w itm< elrEil \3el3l frm sIFrF qfomo
cs'rgfi{ft qI<qr{l I effiqsrR{{{ tcitrgrvq{RqfrE cmcfi
6{r
"rl'k-fir {rgl dq-clt{ qB-{< "R <?l{ m 1frm c'i?r s?Fr
mffi cn[5tst<rt
r
TcFctI rfsti" {fir "l6r<I,< $ G vrll sq <q lq'lt 6&{E c {qrq l{ {$ Err FvFr<ol {uarqn ,s{r 4f1t mqur+1f t1q rru-
qqrq {ftT,R css< ffi vt cT{ ft{s Tc< lqF;r c{, FI6"R c?t
6{rqTl C{'l qFm ('ie I )Ebo qIrE ffi fr.e. eip q{rq{ I qq6
sfufis( qetnEq qalEfl
I
qrtftH< tcq frrErs FRT ftE Ftr"t qtryt I ql.qc.qc rtr{
co:FI Er ? ft-E <r+ v'r<R Er{d lcrs rs oi r ffi rr{ €ffi qFs
c{?fi,lwd Dft T-fls, EBfr< wi }{Etfr-o ftxt {qq F-f,{
Tft< I
c'F '|!,svlgifi '|.v;li{HsqE tqalc{ftBBjq{s alFFr{sql_
<Frt eFr-\rs ootft.t u'rg< frr-qs st'srk tqt q< <|$ frm{ {
|
)Ebo qlr{ ffi eeq {f{ I Eer{ cfirq cq'+t 6{q, T.{q|\dfr fr.q.
GfttsR qlT €{l+olir \3-6{r<Er ..s< cErs 6<Ft qr r ffiqqmrE qvre
c1-m qft:t ftRtt fiEI4 1@ fr(g {r{ I fitfi qF fitcfRqit qMs
vt<s 1S frm, Eftn fim q< qtfSg-q ivrs qc<
I
fifi$c{ q'tft.t ug fistrq< slelfrq: qArlT Egrs c'rmq r ft-E
qslfr q{<
rcrs ftca fr-<tm q-<A cq{ c'l{ tElq TlA rr{< 'fq
qlCS Cofr{i y{ qfc{ I {FI sfsl-rl-?t 'FTqIrf vls1a 'lgl€ \e-rrs
Ef$rsqrql
t
qfi EetF r s{ft{ D-s 6-+ rsre-{, c+Qrq Drq flFH I 6{r[c{
ftE;q 1WT{ I rC C{q 41-(el <-?t I qrd-?t T{-"1 El-< fr164< C{f-st 1gi
vrq<qtq[{Mro<ft+qe*osrrqffi
c'f{ I
r
Elsr'lr )uE) {l1S EtTfu$ fr6'rq q-{ftT.fi mr coQrq<
oEffinrqrqs6q{
r
ffi er
o'cqm firs+ {cq c:t]-< &rfl r <tq-frrr* Tl FrF
"l<
m{r{ +16r en {T{ ffi qrqq ?llilq qrqn {rsFs wR-dr{
qfieirq{ vt qvlq ffi q'fft.tm q< pq ffirrr
TFTcgGT cuk{ a1 I
&-T1T sTlS q'Iful firsnT {Fr-c{ cfi | -\er< {mrsi-< <ltr<rg <-q
cEn-+< qrq tF 6F{t ql{ Rr{I I erfe ffirq< .++E Fn< ixratt-
qIrFrID.rt qR er{{ "ffJ< 69\c< frc{ q'ffir<F-< cmt vF T{q s{ I
v
s(EnsR 6gf{ E?l Rfr <-{t qrffu E{' <]trd c<fr6n ,Ersq
r
a{-a1 aqqqf fuuT , F?tfiT q<frut, T "qIC{{fIt c6+fis:R{r, {F "k{t 'ncl &t r
<rffiffi src{ Ell crr{
"rqcsr, 'rq3
Erq-{ r Tqsa enr Qr-fi <1u wffi s dE\o r qr qs fr{crn
fr-s"flE | frwrr{n qG er+qsn< qT] <qs st+ +fs coR esbt
frc1I fts S]< (<hs sffi sr< q(]]orcfl.fit Ct< s,trq c{t
"irg r
.Ift ecg-{ r )Eb8 $arq c+Qs frtftqjlsr cqm ftfi etTfr$
furq (EftrcS, TqlFr-.u-q, e "intdRnl) EE"rc',q<( Etr cfi
cTrnteeqffiqrl{{ (clr{ft.,.{{.fr. &Q cflIT{
EF qcr mri cfq r q'fft{ E{ fir{ ft-<ranr qftT< crq &4-
ffi eft frK I {m q{flts s'ffin< fr6 I s$rsl-?r ETirc\o< W sli
ffi
m,'R+q EIr$ rean frffi{ c<, egro.n rnErqq{ft"f Er{K {N
{r{r{{-{ T
T$T
I ffi
fuE :rcqo tqm uRfr c+cqq + r tq-orsF fis't
"t
qfffi< q{cfl
rTffi fiql r o-ti R"rr+< 1'rR't-'Es vrsffrf,{'\oREr
ffi
slrq ,qrc 646q I fi61-vltq\9| E'r<e<lq|{ c"rcl cqom ora
c'f6fi tE{s {cq <Ercq,r,-ql,flEgs ffill{ flffi{ cff{ c{fi qrq
TI r effi|-+ qtffiq ryR <s "m{ I ft-E q'tft.t rg,-qIs ilft Em{
qlt
cftm cufcqrt T-Fr {t fi({ mi fr"r+ <lsqt T{st-rr{ Tkq 66
Erq cqfr-< sri ?sftns ultrrq r e'rr car6p qvrr fiq qFl]-tt Florl
qfW qFs 6c'l (rl[an 66 c'rm.q'fft,r E{ {fi sl{ q|cql fi{l
r
+-{rffr, Eqi frft <-+rs-{,-s-t f+crs E'rm oi, stt rsNtr$
qqtffElr{ DI{frIE fie I Elr{T sM cq?fice flr{cq sr<? uttfr "ttot
<r{ I {l-6qrfft o"F sR\r<Iftrad E olc"l cq"lrs {irFI ql I e-F.| {r{
o-rcsl sFE-<Tfu ft-efq ,lgRl< r\o EFr ct tq1 q?Fq'tfti ,-Srs
(sft-csfr Tfirq $ildfiqn-{ q?Ift qrn"rr+-< 'rq 6?\efl qraT,
+rqce-{ ftfr{lq Efi E<a qqft qrEnqq r qi qr+, )EEc {IrE
q'rftl
r-g <-{ cqfrcvft a'6ry6q "rrrtqfrnt< qvlT'rc {cq mrfqrq
FGN
I cqffi
crftrct Trurrq-< qlq{t fEq esl c<nlg r<-r+{
r
q$lerffi ftel RIEm< csr{t crrfit ftqil qq {ltsfr R-{ | qfrE