Radiasi Benda Hitam
179
2B: 26 D6B=:92D 329G2 A2?;2?8 86=32?8 :?D6?C:D2C 2C:E 36?52 I2?8 CE9E?I2 D:?88: =63:9 A6?56 52B: A2?;2?8
86=32?8:?D6?C:D2C36?52I2?8CE9E?I2B6?529 6;2=2A6B86C6B2?
2C
A252 B25:2C: 36?52 9:D2 5:C63ED EE 6B86C6B2? 0:6? ,642B2 2D62D:C EE 6B86C6B2? 0:6? 5:?I2D22? 52=2 A6BEEC2?
36B:ED
2C
?CD2? M
0:6?6?6E2?329G292C:=2=:2?D2B2
2C
52?CE9EED=2 6BEA22?3:=2?82??CD2?C6A6BD:A2526723?52?3:=2?82?
?CD2?A252A6BEEC2?EE6B86C6B2?0:6?36B?:=2:
P
M
EE6B86C6B2?0:6?;E825:8E?22?E?DE6A6B:B22?CE9E C63E29 3:?D2?8 56?82? 6=:92D G2B?2 4292I2 C63E29 3:?D2?8 CE9E
3:?D2?8D6BC63ED52A2D5:AB65:C:2?
Contoh
7.3
,63E2936?525:A2?2C2?9:?88236BCE9E L -6?DE2?=29A2?;2?886=32?8 2C:EB25:2C:D6B2=I2?85:A2?42B2?36?52D6BC63ED
; :6D29E: L
36B52C2B2?6BC222?M22?5:A6B=69
2C 2C
P
M 2C
25:A2?;2?886=32?82C:EB25:2C:D6B2=252=29P
M
I T
1
T
2
T
3
6B52C2B2?8B27::?D6?C:D2CB25:2C: D6B9252A A2?;2?8 86=32?8 C6A6BD:
5:DE?;E2?A2528232B5:C2A:?8 3282:2?2299E3E?82?2?D2B2CE9EED=2
52? ;
2B:8B27:A2528232B5:C2A:?85:A6B=69 329G2EBED2?A2?;2?886=32?8E?DE:?D6?C:D2CB25:2C:2C:E252=29
6B52C2B2?9EEA6B86C6B2?0:6?6723?5:A6B=69 2D2E
25: 5:A6B=69
Contoh
7.4
3. Pendekatan Teori Rayleigh–Jeans
252 D29E? E?4E= A6BD2?I22? 3282:2?2 6?;6=2C2? CA6DBEB25:2C:36?529:D2 6?822D2?52?6CA6B:6?I2?8D6=29
5:=2E2?A2522C2:DE6?4326?42B:A6?;6=2C2? ,A6DBEB25:2C:
Tokoh
Max Planck
1858 – 1947
Max Planck
dilahirkan di Kiel, Jerman. Ia belajar di Munich dan
Berlin. Seperti banyak ahli fisika lainnya, ia seorang pemain musik
yang pandai. Pada tahun 1900 M, setelah 6 tahun belajar di Universitas
Berlin, ia menyatakan bahwa kunci pemahaman radiasi benda hitam
adalah anggapan bahwa pemancaran dan penyerapan radiasi terjadi dalam
kuantum energi hf. Penemuan yang menghasilkan hadiah Nobel 1918 ini
sekarang dianggap sebagai tonggak dari fisika modern. Walaupun selama
Hitler
berkuasa, ia tetap tinggal di Jerman. Ia memprotes perlakuan
Nazi
kepada ilmuwan Yahudi dan sebagai akibatnya ia harus
melepaskan kedudukannya sebagai presiden Institut Kaiser Wilhelm.
Setelah perang dunia kedua, institut tersebut diberi nama Institut Planck
dan ia kembali menjabat sebagai presiden sampai akhir hayatnya.
Sumber: Fundamental Of Physics, 2001
1 m
2 m
3 m
DIUNDUH DARI: WWW.BUKUPAKET.COM Sumber buku bse.kemdikbud.go.id
Mudah dan Aktif Belajar Fisika untuk Kelas XII
180
36?529:D25:D6B2?82?=6946 =1.,-
M52?.627 45;6 37M 6BEEC2?6B626?88E?22?D6B:
7:C:2=2C:C6A6BD:D6B::?6D:82C :6=2C1?52D6=296A6=2;2B:2D6B:A2?2C36?5236B9E3E?82?
56?82?6?6B8::?6D:=6E=82C -6B:6:A2BD:C:6?I2D22?329G2 6?6B8:DD2=82C52=2CE2DEBE2?82?D6BDEDEA5:328:C642B26B2D26
C6D:2A=6E=I2?8D6B52A2D5:52=2BE2?82? :26?6B8:DD2=C:CD6 252=2952?32?I2?I2=6E=I2?836B25252=2BE2?82?252=29
6?6B8:B2D2B2D2I2?85::=::=69C6D:2A=6E=252=29
?6B8::?: D6B2?5E?852=236?DE6?6B8::?6D:C6D:2A=6E= 2?D6D2A:D:52
36B2BD:C6E2=6E=6:=::6?6B8:I2?8C22I2:DE :=2:D6BC63ED 92?I2=296BEA22??:=2:B2D2B2D2
26 6A6B=:92D2? C632B2? 646A2D2? I2?8 5::=:: =6E= 82C ,632B2? 6?6B8: 646A2D2? 2B6?2 6?6B8: :?6D: C6=2=E
36B9E3E?82?56?82?646A2D2? =1.,-376=:92D329G2EBF2 C632B2?:DEC6BEA256?82?92C:=I2?85:A6B=69A252:?D6?C:D2CCA6DBE
B25:2C:D6B2= 6B6236B2?882A2?2526:B:A2?2?D2B2C:72DA2?2C 36?5252?B25:2C:D6B2= 6?82?A6?562D2?I2?86B62=2E2?
=1.,-37 6A6B=69 A6BEEC2? 329G2 :?D6?C:D2C B25:2C: 36B32?5:?8D6B32=:56?82?A2?82D6A2DA2?;2?886=32?8
.?DE I2?8 36C2B :?D6?C:D2C 22? C62:? 64:= A23:=2 6?562D:D29:?882:?D6?C:D2C22?6?562D: ?= 2= :?: C6CE2:
56?82?92C:=6A:B:C 2?D6D2A:2A23:=2 6?562D:?=92=:?:C2?82D 6?I:A2?8 52B: 92C:= 6A:B:C I2?8 6?E?;E2? 329G2 :?D6?C:D2C
6?562D:?=6D:2 C62:?6?864:= 6?I:A2?82? A6BC222? +2I=6:8962?C I2?8 C2?82D ;2E9 :?:
5:?222?N6?42?2.=DB2:=6DO2B6?2 I2?864:=36B25252=2 G:=2I2986=32?8E=DB2F:=6D
26
6?E?;E2? 9E3E?82? :?D6?C:D2C 52? A2?;2?8 86=32?82?D2B2EBF2+2I=6:8962?C52?EBF20:6? -6B:.3
52A2D6?6B2?82?CA6DBEA252A2?;2?886=32?8I2?8A6?56 D6D2A:6?I:A2?86D:26?6B2?82?A2?;2?886=32?8I2?8A2?;2?8
,632=:?I2 D6B: =1.,-37 52A2D 6?6B2?82? CA6DBE A252 A2?;2?886=32?8I2?8A2?;2?8D6D2A:6?I:A2?86D:26?6B2?82?
A2?;2?886=32?8I2?8A6?56
4. Teori Planck
