115
Cahaya dan Optika
4945699B9;1B5217195A2149711C1A125B1AC977921H17141 25B1AC97792541 ,531A1=1C5=1C9B411C49CD9B
L
c. Pemantulan pada Cermin Cembung
5A=935=2D71411835A=9H17=5=99;95A=D;1135=2D7 5A=935=2D725AB961C49E5A75H19CD25AB961C=5=131A;1B91A
17912179135A=935=2D7B55AC914104 0167.1:112+40,1071
,52D182541H17495C1;;149451B52D1835A=935=2D7=5 =99;921H1714571B961CB961CC5AC5CD 1H171B52D182541?5835A=9
35=2D7411C49C5CD;1457131A1=5771=21A;1
41A9B91A9BC9=5F1 14135A=935=2D7 5A81C9;104
14104
C5A981C
1 B91A41C17H17B5:1:1ABD=2DDC1=1491CD;1B51;11;1 41C1741A9C9C9;6?;DB
2 B91A41C17H17=5D:DC9C9;6?;DB491CD;1B5:1:1A4571 BD=2DDC1=1
3 B91A41C17H17=5D:DC9C9;DB1C;557;D7135A=9491 CD;1;5=219=51D99C1B1H17B1=1
1A1=5D;9B21H1712541?5835A=935=2D7C5A981CB55AC9 14104
14131A1C5AB52DCB91A9BC9=5F1H17497D1;1
14118B91A41B91A 5A41B1A;171=21A21H171C5AB52DC411C 49B9=D;1218F12541H17495C1;;149451B52D1835A=935=
2D7B51D=5781B9;121H171=1H1C571;41495A;539 7075340,1071
+D=DB14135A=935=2D7B1=1B55AC9AD=DBH1725A1;D141 35A=935;D7H19CD
L
Gambar 6.15
Bagian-bagian cermin cembung R = jari-jari kelengkungan cermin
P = titik pusat kelengkungan cermin F = titik fokus cermin
f = jarak titik fokus ke cermin SU
O f
F P
R
O F
P
Gambar 6.17
Lukisan pembentukan bayangan oleh cermin cembung
a b
c
O F
P
Gambar 6.16
Sinar-sinar istimewa pada cermin cembung
181H175AD495A81C9;114118 1 C141:1A1;6?;DB14135A=935=2D7B51D25A919571C96 1
9949B5212;15C1;C9C9;6?;DB14135A=935=2D7C5A5C1;49 251;1735A=9
2 DCD; 2541 H1C1 49 451 35A=9 35=2D7 B51D C5A25CD; 21H171=1H1 14991914135A=935=2D725AC141571C96
,52D1835A=935;D7=5=99;9:1A9:1A9;557;D71
= ,52D182541495C1;;1141 :1A1;=41A935A=9C977925413= 9CD7185C1;C9779415A25B1A121H171
9 9;5C18D9
Contoh
6.4
2 DCD; 2541 H1C1 49 451 35A=9 35=2D7 B51D C5A25CD; 21H171=1H1 149919B14135A=935=2D725AC141571C96
Di unduh dari : Bukupaket.com
116
Mudah dan Aktif Belajar Fisika untuk Kelas X
p s
s p
benda bayangan
P
= =
= 3=
571=577D1;14501
;495A?58
L L
=
3=3= 1495C1;21H171=4945135A=9C9779H1
3=415A25B1A1H1
;19
,52D182541495C1;;13=4945135A=935=2D7H1725A:1A9:1A93= 1 9=115C1;21H171
2 5A115A25B1A1H1 3 D;9B:11H1B91A1415=25CD;121H171
9 9;5C18D9
3= L3=
L
L3= 1
6 L
L L
L3= 2
L
1495A25B1A1H1 ;19B961C21H171C571;=1H141495A;539
3
Contoh
6.5
Kata Kunci
• optika geometri
• optika fisis
• pemantulan baur
• pemantulan halus
• bayangan nyata
• bayangan maya
• titik fokus utama
• pusat kelengkungan
Tes Kompetensi Subbab
B
4-.1+07.76,+1 ,525A;1BB91A41C17:1CD8141B52D185A=D;11
35A=94571BD4DCJ 9;149979;1B91A1CD ?5835A=9;54D1B5:1:1A4571B91A41C1725A11;18
BD4DC1C1A135A=95AC1=14135A=9;54D1 -9712D1835A=949BDBDB55AC971=21A25A9;DC
-5CD;11A18B91A1CD41A935A=9C5AB52DC D12D1835A=941C1A=5=25CD;BD4DCJ
,52D18 2541 C5A5C1; 49 451 ;54D1 35A=9 C5AB52DC -5CD;1 :D=18 21H171 H17 C5A
25CD; ,52D182541C571;C9779H1
3=495C1;;149
45135A=935;D725A:1A9:1A9
3=141:1A1; 3=41A935A=9
1 -5CD;1:1A1;21H171;535A=9 2 D;9B:1A1;H1B91A1415=25CD;121H171
3 -5CD;1B961CB961C21H171
30° 140°
120° cermin I
cermin II cermin III
Di unduh dari : Bukupaket.com
117
Cahaya dan Optika
C. Pembiasan Cahaya
Kategori