Fisica Moderna
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7/18/2019 Fisica Moderna
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OBJETIVO GENERAL
• ESTUDIAR LA RADIACIÓN COMO LA EMISIÓN, PROPA
TRANSFERENCIA DE ENERGÍA EN CUALQUIER MEDIOFORMA DE ONDAS ELECTROMAGNÉTICAS O PARTÍCU
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OBJETIVOS ESPECIFICOS
• ESTUDIAR Y COMPRENDER EL EFECTO COMPTON, YEFECTO FOTOELECTRICO.
•CONOCER LAS DIFERENTES MANIFESTACIONES QUE TENER LA RADIACION ELECTROMAGNETICA.
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RADIACIONELECTROMAGNETIC
• La rada!"# $%$!&r'(a)#*&!a $+ #a -'r(a d$ $#$r)a /0r'0a)ar+$ ' 1a2ar a &ra1*+ d$% 1a!' 3$+ d$!r, a d-$r$#!-'r(a+ d$ $#$r)a, #' #$!$+&a # ($d' (a&$ra% 0ara &raA#/$ &a(5*# 0$d$ 0r'0a)ar+$ 0'r ($d'+ (a&$ra%$+ar$, $% a)a '&r'+, $+ $# $% 1a!' d'#d$ %a rada!"#$%$!&r'(a)#*&!a 1a2a !'# (a6'r $7!$#!a 6 1$%'!dad.
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TEORIA DE FOTONES• U#a d$ %a+ !ara!&$r+&!a+ (0'r&a#&$+ d$ #a '#
$%$!&r'(a)#*&!a $+ /$ 0$d$ &ra#+0'r&ar $#$r0#&' a '&r'.
• E# 89::, Ma; P%a#!< a7r(" /$ %a rada!"# $ra$# -'r(a d$ !a#&'+, 0a/$&$+ d$ $#$r)a d$ -r$d$&$r(#ada, a %'+ /$ E#+&$# %%a(" -'&'#$+, 6 $#$r)a d$ # !a#&' 3-'&"#4 $+&= dada 0'r>
D'#d$ ? @,@@; %a !a% $+ %a !'#+&a#&$ d$ PL
• S # -'&"# $;+&$, $#&'#!$+ +$ ($1$ a %a 1$%'!%, 0'r %' &a#&' !ada -'&"# &$#$ # ('($#&(
• D$+d$ $% 0#&' d$ 1+&a !=#&!', # a d$ $#$r$%$!&r'(a)#*&!a +$ !'(0'#$ d$ -'&'#$+ /$ +$
d$+0%aa# a %a 1$%'!dad !.
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EFECTO FOTOELECTRICO
• E% $-$!&' -'&'$%*!&r!' !'#++&$ $# %a $(+"# d$ $%$!&r'#$+ 0'(a&$ra% !a#d' +$ %' %(#a !'# rada!"# $%$!&r'(a)#*&!a%&ra1'%$&a, $# )$#$ra%4.
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• E# $% $+/$(a !=#&!', %a $#$r)a &ra#+0'r&ada 0'r # -'&"#0'r # +'%' $%$!&r"#. S $+&$ +$ $;0%+a d$% (a&$ra%, %a d-$r$
$#$r)a /$ a5+'r5$ 6 a/$%%a !'# %a !a% $+&a5a #d' a %a ++ $#$r)a !#*&!a.
• La $#$r)a !#*&!a (=;(a d$ # $%$!&r"# $+>
D'#d$>
? $'
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EFECTO COMPTON
• E% $-$!&' C'(0&'# $+ $% !a(5' d$ %'#)&d d$ '#da d$ %a rad
$%$!&r'(a)#*&!a d$ a%&a $#$r)a a% +$r d-#dda 0'r %'+ $%$!&• E+&$ $-$!&' #1'%!ra '5+$r1ar %a d+0$r+"# d$ %a rada!"#
$%$!&r'(a)#*&!a d$ #a 0ar&!%a !ar)ada $# # !'/$, $#&%a 0ar&!%a %5r$ !ar)ada.
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• U# -'&"# d+0$r+' $;0$r($#&a # d$+0%aa($#&' $#d$ '#da, dad' 0'r>
D'#d$>
, +$ %%a(a %'#)&d d$ '#da d$ C'(0&'#.
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PRODUCCION Y ANIQUILACIOPARES
• E# $% 0r'!$+' d$ 0r'd!!"# d$ 0ar$+, %a $#$r)a &ra#+0'r&ada-'&"# +$ !'#1$r&$ !'(0%$&a($#&$ $# (a&$ra, da#d' !'(' r$
!r$a!"# d$ # 0ar $%$!&r"#0'+&r"#3# 0'+&r"# $+ d*#&!' a $%$!&r"# $;!$0&' 0'r + !ar)a4.
• La 0r'd!!"# d$ 0ar$+ #' 0$d$ dar+$ $# $% 1a!'.
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• E% #!%$' &ra#+0'r&a #a !a#&dad !'#+d$ra5%$ d$ ('($#&#!d$#&$H 0$r' d$5d' a + )ra# (a+a, + $#$r)a !#*&!a $+ )#'rada.
• La !'#+$r1a!"# d$ %a $#$r)a +$ 0$d$ a0%!ar a d!'+ #!
)#'rad'+, 0r'd!$#d'>
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ANIQUILACION DE PARES• S$ $%(#a # 0'+&r"#$%$!&r"#, da#d' !'(' r$+%&ad' %a !r$
' (a+ -'&'#$+.
• S$ d$5$# -'r(ar a% ($#'+ d'+ -'&'#$+ 0ara /$ +$ !'#+$r1$%a !a#&dad d$ ('1($#&'.
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ABSORCION DE FOTONES
• La #&$#+dad d$ # a d$ rada!"# +$ r$d!$ !a#d
&ra1*+ d$ # (a&$ra%, 0'r/$ %'+ -'&'#$+ +'# r$('1dd+0$r+ad'+ d$ %a dr$!!"# d$%a#&$ra 0'r a%)#a !'(%'+ $-$!&'+ a#&$r'r ($#&$ ($#!'#ad'+.
• La r$d!!"# $# #&$#+dad '5$d$!$ a %a %$6 d$ a('r&$;0'#$#!a%>
D'#d$>
$+ %a #&$#+dad d$ %a rada!"# #!d$#&$ +'5r$ $% a5+'r3$% !'$7!$#&$ d$ a5+'r!"# %#$a%4.
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RADIACION DE CUERPO NEG
• S'5r$ %a +0$r7!$ d$ # !$r0' #!d$ !'#+&a#&$($#&$ $#$r)a&a#&' d$+d$ $% #&$r'r !'(' d$+d$ $% $;&$r'r, %a /$ #!d$
$;&$r'r 0r'!$d$ d$ %'+ '52$&'+ /$ r'd$a# a% !$r0'. Ca#d' rada#&$ #!d$ +'5r$ %a +0$r7!$ #a 0ar&$ +$ r$$2a 6 %a '&r&ra#+(&$.
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CUERPO NEGRO• U# '52$&' d$a% /$ a5+'r5$ &'da %a rada!"# /$ %%$)a a +
%%a(a cuerpo negroK. U# !$r0' #$)r' $+ &a(5*# # $(+'rada!"# 6 $(&$ %a (=;(a !a#&dad d$ $#$r)a a !a%/$r &
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• A% d$d!r &$"r!a($#&$ %a rada!"# d$% !$r0' #$)r' 3R J$a#+4 +$ '5&$#$ #a !r1a !r$!$#&$ /$ +$ ada0&a a %$;0$r($#&a% 0ara )ra#d$+ 0$r' +$ +$0ara 5r+!a($#'#a d$% %&ra1'%$&a
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LEY DE STEFAN Y BOLTMAN
• La $#$r)a &'&a% radada 0'r #dad d$ =r$a 6 0'r #dad d$ &
!$r0' #$)r' $+ dr$!&a($#&$ 0r'0'r!'#a% a %a !ar&a 0'&$#&$(0$ra&ra &$r('d#=(!a.4
5 48 -1 -2 -4
2 3
25.670400(40) 10 J s m K
15
F T
k
c h
σ
π σ
−
=
= = ×
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LEY DE IEN
La %'#)&d d$ '#da d$ (=;(a #&$#+dad d$ # !$r0' #$
#1$r+a($#&$ 0r'0'r!'#a% a + &$(0$ra&ra.
(a; ∙ T = cte
d'#d$ (a; $+ %a %'#)&d d$ '#da d$ %a (=;(a $(+"# d$'52$&' /$ a +d' !a%$#&ad' 6 T %a &$(0$ra&ra $;0r$+ad$%1#.
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CONCLUSIONES
• E% $-$!&' -'&'$%*!&r!' !'#++&$ $# %a $(+"# d$ $%$!&r'#$+d$ # ($&a% a% +$r rradad' !'# rada!"# $%$!&r'(a)#*&!a
$(5ar)', #' +r1$ !a%/$r rada!"# $%$!&r'(a)#*&!a, &$&$#$r #a d$&$r(#ada -r$!$#!a, d$#'(#ada -r$!$#!aP'r d$5a2' d$ d!a -r$!$#!a (5ra% #' +$ 0r'd!$ $-$!&-'&'$%*!&r!'.
• La -'r(a (=+ !'#'!da d$ $#$r)a $%$!&r'(a)#*&!a $+ %a %
-r$!$#!a d$ %a % +'%ar 3% 1+5%$4 0$d$ +$r &'(ada !'d1+'ra $#&r$ %a rada!"# '#a#&$ 3ra6'+ )a((a, ra6'+ '#a#&$ 3rad'-r$!$#!a+ 6 (!r''#da+4
• Cada #' d$ %'+ $-$!&'+ 0r$d'(#a# a d-$r$#&$+ $#$r)a+ -'&'#$+. A 5a2a+ $#$r)a+ 3ra6'+ 4 0r$d'(#a $% -'&'$%*!&r$#$r)a+ ($da#a+ 3a%r$d$d'r d$ 8M$V4 , $% C'(0&'#H a $#
(a6'r$+, %a 0r'd!!"# d$ 0ar$+.
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BIBLIOGRAFIA
• FISICA MODERNA SCAUM , SEGUNDA EDICION, CAPITULO 9.
• &&0>55%'&$!ad)&a%.%!$.$d.(;+&$+!$#!a1'%($#!$#(+$!@.&(
•
&&0>.1r&a%.#a%.$d.!'!r+'+!$#!a+::::%$!!'#a!'r0+!%arrada!'#$-$!&'!'(0&'#.&(