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Nguyn Hi ng Gia S Vt LHi Phng_0972.53.!03

IV: SNG M

DNG 1CNG M, MC CNG M,CNG SUT NGUN M

+ Cng ! "#:W P

I= =tS S

+ Cng ! "# $%& 1 &'# ()(* ngn #!$ -%n .: 2P

I=4 R

/ 02, 34 n5ng 36ng "# (78 ngn "#9 0/2 (;ng *)$ "# (78 ngn "#9 S 0#?2 34 @&An $B(* #$ ;ng gE( F& >*ng $HJn "#

0F& *ng *-4ng ()(* T8& ng& (e# $*h 6( "# : @Q in 1j@Qk*& I $5ng 3ln 1n3Kn $*L $5ng $*l# 1n 0@Q2

g01a2 am 8 3ga a18m 3g0a

b2 3g83gb

C" 19 Mc cng ca mt m l ( )dBL 30= . H! t"n# cng ca m n! t#$% &n '(2/ mW )*+t cng m c#,-n l ( 2120 /10 mWI

= .

.101W/m2. ). 10W/m2. . 103W/m2. . 104W/m2.

C" ?9 Mt ng,n m 5 6c%* n# ng,n *7m8 c9ng :,;t 46mW8. ng,n m ' m9* t?ng@, Ang #BngC bD E,a :F #;G t# m ' G#n J m ca m9* t?ng. #% b*+t ngKng ng#$ 'ngKng a, L* 'B* m lNn lOt 10116W/m28 ' 1036W/m28. 7 ng#$ Oc m m Q#9ng c cmg*Rc a, t# G#* ng t?%ng G#Jm '* n% t?Bc 5T.10 m 1000 m ). 1 m 10000 m

. 1 m 1000 m . 10 m 10000 m

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Nguyn Hi ng Gia S Vt LHi Phng_0972.53.!03

C" j9 U#%ng cRc# 1m t?Bc mt cR* l%a mc cng m l V0). Mt ng* ng t?Bc l%a 100mt#* Q#9ng ng#$ Oc m % l%a G#Rt ?a nXa. )*+t cng m c#,-n ca m l I %= 1012W/m2.

YgKng ng#$ ca ta* ngng lZ

. 10W/m2 ). 10VW/m2 . 1010W/m2 . 10W/m2

C" 9 Ha* m c mc cng m c#[n# l\c# n#a, l 40 ). ]^ :L cng m ca c#_ng l. 102. ). 4.103. . 4.102. . 104.

C" 9 Mt ng,n m 5C G#Rt :ng m t#$% m`* G#&ng n# n#a,. Ha* *7m C ) nm t?[n cngng t#Ang * E,a ng,n 5 ' cng b[n :% 'B* ng,n. U#%ng cRc# t ) +n ng,n lBn #&n t +nng,n bLn lNn. Y+, mc cng m tJ* l d0) t# mc cng m tJ* ) ;G ^ bngZ. 4) ). 1e) . 20) . 1d0)

C" o9 Mt ng* ng cRc# ng,n m mt Q#%ng f. U#* ng* t*+n lJ* gNn ng,n m mtQ#%ng l = 12dCm t# t#;! cng m tng g;G 3 lNn. a ng t#Ang ,;t G#Rt t 5. ]J* 5 ht mt ng,n*7m G#Rt :ng m Ang #Bng ?a Q#9ng g*anC m9* t?ng Q#9ng #;G t# m. Mc cng m tJ* l d0 )C tJ* ) l 20 ). Mc cng m tJ* t?,ng *7m M ca %Jn ) l

8 2d ). )8 1V ). 8 34 ). 8 40 ).

C" q9 ]J* *7m cRc# ng,n m Ang #Bng 10 m c mc cng m l 24 ) t# tJ* n&* m mccng m bng Q#9ng cRc# ng,nZ. i ). 31d2 m . 1eC4 . 212 m

C" r9 Mt ng,n m S G#Rt ?a m c tNn :L Rc (n#. Yng lOng m t?,!@n * G#n G#L* @, t?[nmht cN, tm S bRn Q"n# . )D E,a :F G#n J ca :ng m t?[n mht ;t ' cRc 'jt cn. ]a* *7m cRc# ng,n m S 100 mC mc cng m l 20 ). kRc (n# '( t?" *7m ) 7 tJ* mc cng m bng 0.. 1000m. ). 100m. . 10m. . 1m.

C" 19 )a *7m C )C t#,c n>a ng t#Ang t . ]J* ht mt ng,n G#Rt m Ang #Bng cc9ng :,;t t#a! *. U#* P = P1t# mc cng m tJ* ) l d0 )C tJ* l 20). U#* P = P 2t# mc

cng m tJ* ) l 0 ) ' mc cng m tJ* l. e0) ). d0) . 10) . 40)

C" 119 )a *7m 5C MC Y cng nm t?[n mt n>a ng t#Ang ,;t G#Rt t 5. ]J* 5 ht mt ng,n*7m G#Rt :ng m Ang #Bng ?a Q#9ng g*anC m9* t?ng Q#9ng #;G t# m. Mc cng m tJ* Ml V0 )C tJ* Y l 30). Y+, c#,!7n ng,n m :ang '( t?" M t# mc cng m tJ* t?,ng *7mMY Q#* l. 3dC1 ). ). 41C2 ). . 33C4 ). . 42C1 ).

C" 1?9 Mt ng,n m P G#Rt ?a m Ang #Bng. Ha* *7m C ) nm cng t?[n mt G#&ng t?,!@n:ng c mc cng m lNn lOt l 40) ' 30). *7m M nm t?%ng m9* t?ng t?,!@n :ng :a%

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Nguyn Hi ng Gia S Vt LHi Phng_0972.53.!03c#% M) ',9ng cn . kRc (n# mc cng m tJ* MT. 3VCe4) ). 32C4d) . 3eCe4) . 3C4d)

C" 1j9 Yg,n m tJ* 5 c c9ng :,;t Q#9ng *. ]?[n cng ng t#Ang E,a 5 c ba *7m C )C

cng nm '@ mt G#"a ca 5 ' t#$% t# tF a c Q#%ng cRc# tB* ng,n tng Nn. Mc cng mtJ* ) Qom mc cng m tJ* l a 6)8C mc cng m tJ* ) #&n mc cng m tJ* l 3a

6)8. )*+t 5 =2

35). ]"n# t^ :L

5

5

.1

1d ).

4 .

2V

.

32

2VC" 19 Ha* *7m nam cng mt G#"a ca ng,n mCt?[n cng mt G#&ng t?,!@n m cRc# n#a, mtQ#%ng bng a Cc m,c cng m lNn lOt l pM=30) ' pY=10).b*+t ng,n m l Ang#Bng.n+, ng,n m ht tJ* *7m M t# mc cng m tJ* Y l.12) ).V) .11) .)

C" 19 Mt ng,n 5 G#Rt :ng m c c9ng :,;t Q#9ng * t?%ng mt m9* t?ng Ang #Bng 'Q#9ng #;G t# m. ]J* *7m C mc cng m l 40). Y+, tng c9ng :,;t ca ng,n m l[n 4lNn n#ng Q#9ng * tNn :L t#* mc cng m tJ* l Z. e2) ). dV) .4d ) . . 1d0)

C" 1o9 ]?%ng b,* #qa n#Jc Oc t c#c Y# HRt lBn H Y* n#n (G Q^ n*\m 1000 nm ]#ngp%ng. Mt ng* ng* B* Q#Rn * ng#$ Oc m % mt c#*+c n g*a% #ng G#Rt ?a c mccng m 12 ). U#* n n#Jc g*a% #ng t#Fc #*\n bn #OG Bng ng* cm n#jn Oc ml 2C3Vd ). HD* n n#Jc g*a% #ng c ba% n#*[, ng*T. ng*. ). 1 ng*. . 12. ng*. . 1e ng*.

C" 1p9 6H20128Z ]J* *7m 5 t?%ng m9* t?ng Ang #BngC Q#9ng #;G t# mC c 2 ng,n m*7mC g*Lng n#a, 'B* c9ng :,;t G#Rt m Q#9ng *. ]J* *7m c mc cng m 20 ). 7 tJ*t?,ng *7m M ca %Jn 5 c mc cng m l 30 ) t# :L ng,n m g*Lng cRc ng,n m t?[ncNn ht t#[m tJ* 5 bng. 4. ). 3. . e. . V.

C" 1q9 c9ng :,;t m t#an# cFc J* ca mt mR! ng#$ n#Jc l 10W. c#% ?ng Q#* t?,!@n * t# c mr*1m t# nng lOng m lJ* b( g*m es :% 'B* nng lOng ban N, % :F #;G t# ca m9* t?ng . b*+t

cng m c#,-n l 12 210 /I W m= . mc cng m lBn n#;t Q#%ng cRc# dm gNn bng ba%

n#*[,T

. 10C21) ). 10C21) . 1C21) . VC3e)

C" 1r9 Mt ng,n m Oc c%* l ng,n *7m G#Rt :ng cN, ' m9* t?ng Q#9ng #;G t# m. ]J*mt '( t?" :ng m c b*[n 0C12mm c cng m tJ* *7m bng 1C0W/m 2. HD* tJ* '( t?" :ngc b*[n bng 0C3dmm t# : c cng m tJ* *7m bng ba% n#*[, T. 0Cd0W/m2 ). 2CV0W/m2 . eC40W/m2 . 1dC2W/m2

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Nguyn Hi ng Gia S Vt LHi Phng_0972.53.!03C" ?9 ]J* mt G#qng ng#$ n#Jc C tJ* mt '( t?" Z mc cng m tJ% ?a t ng,n l Ve) C mccng m G#n J bc tng G#"a :a, l V2) .]*n# cng m t%n G#Nn tJ* '( t?" la ba%n#*[, 6bc tng Q#9ng #;G t# m 8 .VV) . ) .V) . . 1) . 3)

DNG ?C\U ks,TtN Su ,VvN TuC,QwC SNG,CxC N\C Cy

zT{( ! $HJn

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Nguyn Hi ng Gia S Vt LHi Phng_0972.53.!03T8 (E: [ 1+n [ 1+n ?[m*n

C" 19]Lc t?,!@nm t?%ngQ#9ngQ#" l330m/:C t?%ngnBc l143em/:.MtmcbBc:ng t?%ngQ#9ngQ#"le0cmt#SQ#*t?,!@nt?%ngnBccbBc:nglZ

.21VC4cm. ).11Cecm. .203Ccm. .Mtg*Rt?(Q#Rc.

C" ?9Mtng*gvmtn#Rtb_a'%ng:wtcRc#10edmmtng*Q#RcRGta*'%ng :wtt#Sng#$t#;!2t*+nggvcRc#n#a,3g*!.)*+ttLct?,!@nmt?%ngQ#9ngQ#"l330m/:t#StLc t?,!@nmt?%ngng:wtl

.e200m/: ) .e20m/: .e300m/: .e100m/:

C" j9Mt:ngmctNn:LIRc(n#t?,!@nt?%ngQ#9ngQ#"'t?%ngnBc'B*tLclNnlOtl330m/:'14e2m/:.U#*:ngmt?,!@ntnBc?aQ#9ngQ#"t#SbBc:ngcan:

.tng4lNn. ).tng4C4lNn. .g*=m4C4lNn. .g*=m4lNn.

C" 9 Mt :ng m t?,!@n t?%ng t#oG 'B* tLc e000 m/:. Y+, l\c# G#a ca :ng m #a*

*7m gNn n#a, n#;t cRc# n#a, 1 m t?[n cng mt G#&ng t?,!@n :ng l2

t# tNn :L ca :ng bng

.1000 Hx ).12e0 Hx . e000 Hx .2e00 Hx

C" 9 Mt ng* ng cRc# mt bc tng e00 m ng#$ mt t*+ng :_ng n. y( t?" ht :_ng cRc# tng1de m. Yg* ' :_ng cng t?[n ng t#Ang ',9ng gc 'B* tng. Sa, Q#* ng#$ t*+ng nC ng* n!lJ* ng#$ t*+ng n % m t#an# G#n J t?[n bc tng. ]Lc m t#an# t?%ng Q#9ng Q#" l 330 m/:.U#%ng t#* g*an g*Xa #a* t*+ng n lZ

. 13 : ). 23 : . 1 : . 43 :

C" o9 Mt Lng :R% * 0cmC mt N, b(t Q"n mt N, #C b*+t 'jn tLc t?,!@n m t?%ng Q#9ng Q#" l340m/:. kRc (n# tNn :L lBn n#;t m Lng :R% G#Rt ?a m mt ng* bn# t#ng c t#7 ng#$ OcT6U+t E, l;! gNn _ng +n 2 :L :a, ;, G#-!8. 1CV QHx. ). 1C QHx. . 1CeQHx. . 1Cdd QHx

C" p9 #% #a* ng,n :ng m Q+t #OG C ) ht cRc# n#a, 2 m a% ng cng G#a n#a,. * c#,!7nt?[n %Jn )C ng* ta t#;! c e '( t?" m c t% cFc J*. #% b*+t tLc t?,!@n m t?%ng Q#9ng Q#"

l 3e0 m/:. ]Nn :L z ca ng,n m c g*R t?( t#% mn.3e0 Hx z { e2e Hx. ).1Ve Hx { z { 2d2Ce Hx..3e0 Hx { z { e2e Hx. .1Ve Hx z { 2d2Ce Hx.

C" q9 t Q#" t?%ng Lng t#,| t*n# c ca% l c t#7 t#a! * Oc n# *@, c#^n# mFc nBc t?%ngLng. ht mt m t#%a t?[n m*\ng Lng t#,| t*n# . U#* m t#%a a% ngC n G#Rt ?a m c& bnC tat#;! t?%ng ct Q#" c mt :ng ng n (n#. U#* ca% ca ct Q#" n#D n#;t l0= 13cm ta ng#$ Ocm t% n#;tC b*+t N, # l mt bng :ngC N, ) l n_tC tLc t?,!@n m l 340m/:. ]Nn :L m %m t#%a G#Rt ?a lZ. ed3CHx ). deHx . de3CHx . 3deCHx

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Nguyn Hi ng Gia S Vt LHi Phng_0972.53.!03C" r9 Ha* ng,n m n#D S1C S2g*Lng n#a, 6Oc c%* l #a* ng,n Q+t #OG8 G#Rt ?a m t#an# cng G#a' cng b*[n . Mt ng* ng *7m Y 'B* S1Y = 3m ' S2Y = 3C3Vem. ]Lc t?,!@n m t?%ngQ#9ng Q#" l 330m/:. ]m bBc :ng * n#;t 7 ng* Y Q#9ng ng#$ Oc m t#an# t #a*ng,n S1C S2G#Rt ?a.

. = 1m ). = 0Cem . = 0C4m . = 0CVem

C" 19 Sng `c t?[n mt :O* ! * l" tng 'B* tNn :L e0Hx C 'jn tLc :ng la 200cm/: C b*[n :ng la 4cm. ]m Q#%ng cRc# lBn n#;t g*Xa 2 *7m C).)*+t C) nm t?[n :O* ! C Q#* c#a c :nglNn lOt cRc# ng,n mt Q#%ng l 20cm ' 42cm..32cm ).14cm .30cm .22cmC" 119 Mt m t#%a c tNn :L a% ng ?*[ng e0Hx Oc ht :Rt m*\ng mt Lng ng#*\m #n# t?R! Q"n ht t#Ang ng ca% 0cm. Nn nBc '% Lng ng#*\m +n ca% 30cm t# t#;! m OcQ#,+c# J* l[n ?;t mJn#. )*+t tLc t?,!@n m t?%ng Q#9ng Q#" c g*R t?( nm t?%ng Q#%ng

smvsm /3e0/300 . HD* Q#* t*+G tc nBc t#[m '% Lng t# c t#[m m;! '( t?" ca mFc nBc

c#% m Oc Q#,+c# J* mJn#T. 1 ). 2 . 3 . 4

C" 1?9 Ha* ng,n m *7m G#Rt :ng cN, ng b 'B* tNn :L d0f Hz= Oc ht tJ* ' ) cRc#n#a, 1m t?%ng Q#9ng Q#". )*+t tLc t?,!@n m t?%ng Q#9ng Q#" l 340v m s= . )D E,a :F #;G t#m ca m9* t?ng.

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Nguyn Hi ng Gia S Vt LHi Phng_0972.53.!03C" 1q9 Mt :O* ! n #* 'B* mt N, tF %C mt N, cL (n# c :ng ng 'B* 2 tNn :L l*[n t*+G lz1' z2. )*+t :O* ! c c#*@, * p ' z2 } z1. ]Lc lan t?,!@n :ng t?[n ! Oc t"n# bng b*7, t#cZ

. ' = p6z2~ z18/2 ). ' = p6z 2 z18/2 . ' = p6z 2 z18 . ' = 2p6z 2 z18

C" 1r9 Mt Lng :R% * 0 cmC # #a* N,C tJ% ?a mt :ng ng t?%ng Lng :R% 'B* m l cFc J* #a* N, LngC t?%ng Q#%ng g*Xa Lng :R% c #a* n_t :ng. )Bc :ng ca m l. 20= cm ). 40= cm . 0= cm . 1d0= cm.

C" ?9 Ha* ng,n m n#D S1C S2g*Lng n#a, 6Oc nL* 'B* mt ng,n m8 G#Rt ?a m t#an# 'B* cng mtG#a ' cng cng mJn#. Mt ng* ng *7m Y 'B* S1Y = 3m ' S2Y = 3C3Vem. ]Lc t?,!@n mt?%ng Q#9ng Q#" l 330m/:. ]m bBc :ng * n#;t 7 ng* Y Q#9ng ng#$ Oc m t#an# t #a* ng,nS1C S2G#Rt ?a.

.= 0Cem ). = 0CVem . = 0C4m . = 1m