215gelombang-110730234148-phpapp01 (1)

7/25/2019 215gelombang-110730234148-phpapp01 (1)

1/20

BAHAN AJAR FISIKA KELAS XII SEMESTER I

OLEH

BAHAN AJAR FISIKA KELAS XII SEMESTER I

REVIEW OLEH:

NUR SAMSUDIN.S.Pd.FisSMA NEGERI 2 PURBALINGGA


2/20

Stada! "#$%&t&si da "#$%&t&si dasa!

Idi"at#! P&'a%aia

Mat&!i

Lati(a

E)a*+asi

K&*+a!


3/20

, Standar Kompetensi.M&&!a%"a "#s&% da %!isi% -&a*a-&*#$/a- da*a$ $&0&*&sai"a $asa*a(

, Kompetensi Dasar.

M&d&s"!i%si"a -&a*a da 'i!i1'i!i

-&*#$/a- s&'a!a +$+$


4/20

Idi"at#! P&'a%aia

, M&-id&tii"asi "a!a"t&!isti" -&*#$/a-t!as&!sa* da *#-it+dia*

, M&-id&tii"asi "a!a"t&!isti" -&*#$/a-

$&"ai" da &*&"t!#$a-&ti", M&0&*idi"i siat1siat -&*#$/a-

3%&$at+*a4%&$/iasa5 s+%&!%#sisi5it&!&!&si5 dis%&!si5 di!a"si5 da%#*a!isasi6s&!ta %&&!a%0a da*a$ "&(id+%a s&(a!i1(a!i

, M&-id&tii"asi %&!sa$aa -&*#$/a-/&!a*a da -&*#$/a- stasi#&!


5/20

GELOMBANG

I. Pengertian Gelombang

G&*#$/a- ada*a( %&!a$/ata -&ta!a

II. P&$/a-ia G&*#$/a-

7. P&$/a-ia G&*#$/a- "a!&a A!a( -&ta!0a1 G&*#$/a- t!as)&!sa*

1 G&*#$/a- L#-it+dia*

2. P&$/a-ia G&*#$/a- "a!&a A$%*it+d# da as&0a

1 G&*#$/a- B&!a*a

1 G&*#$/a- Dia$ 3 Stasi#&!68. P&$/a-ia -&*#$/a- "a!&a $&di+$0a

1 G&*#$/a- M&"ai"

1 G&*#$/a- E*&"t!#$a-&ti"


6/20

S&t&*a( A /&!-&ta! s&*a$a t d&ti" $a"a titi" P t&*a( /&!-&ta! s&*a$a:

P

A

I

II

X

V

Y

x

T

t

T

t

T

tatau

v

xtt p

vx

p

p =

==

GELOMBANG BERJALANRANS!ERSAL


7/20

Ma"a Si$%a-a G&*#$/a- /&!a*a :

k=

2

2 x

Y = A Sin (t - )T v

t xY = A Sin (2 - 2 )

T

Y = A Sin (2ft - kx)

xY = A Sin (2ft - 2 )

ptSinY=T

2=


8/20

Se"ara #m#m persamaanGelombang ber$alan %

= xftAyP 22sin

( )kxftAyP = 2sinDi$aa :9% Si$%a-a -&*#$/a- di titi" P 3 $5'$ 6

A A$%*it+d# -&*#$/a- 3 $5'$ 6

X Ja!a" titi" P da!i titi" %+sat O 3 $5 '$ 6

V K&'&%ata !a$/at -&*#$/a- 3 $4s5 '$4s 6

" Bi*a-a -&*#$/a-

Paa- -&*#$/a- 3 $5'$ 6

F!&"+&si G&*#$/a- 3 H; 6

T P&!i#d& -&*#$/a- 3 s 6

< K&'&%ata s+d+t 3 !ad4s 6

t La$a0a titi" asa* t&*a( /&!-&ta! 3 s 6


9/20

Gelombang Stasioner

& Gelombang Diam '

a. Pemant#lan Pada ($#ng Bebas

P

07

Ut+" G&*#$/a- Data- di titi" P:

L

)

11

PP

tl x t l xt t

v T T

= =

22

PP

tl x t l xt t

v T T

+ += = Ut+" G&*#$/a- %at+* di titi" P:

-

+

=

xl

TtAy 2sin1

=

xl

T

tAy 2sin

2

02


10/20

Ut+" -&*#$/a- Stasi#&!

)(2cos2sin2

xl

T

tAyP

=

9P

07

= 02

=

l

TtxAyP 2sin)(2cos2

2 .cos 2 ( ) .x

A amplitudo gel stasioner

=

2 .cos 2 ( ) Px

A A

=

=

l

T

tAy PP 2sin

Ma"a Si$%a-a G&*#$/a- Stasi#&! di titi" P :

sin 2 sin 2pt l x t l x

y A AT T

= + +


11/20

Ut+" -&*#$/a- Stasi#&!

Leta* Simp#l dan Per#t %

L&ta" si$%+* da %&!+t di(it+- da!i ++- %at+* "& titi" 0a-

/&!sa-"+ta .

+. Leta* simp#l.Si$%+* t&!adi i"a A% > da da s&'a!a +$+$ t&*&ta" %ada:

S3 2 =76.?@

T&$%at1t&$%at 0a- $&$%+0ai a$%*it+d# t&!/&sa! dis&/+t %&!+tda s&'a!a +$+$ t&*&ta" %ada:

,. Leta* Per#t.

P 3 @ 6


12/20

b. Pemant#lan pada #$#ng tetap

P

0702

C

G&*. data-G&*. %at+*

G&*. stasi#&!

Ut+" G&*#$/a- Data- di titi" P:

+

=

xl

T

tAy 2sin

1

Ut+" G&*#$/a- %at+* di titi" P:

1

=

xl

T

tAy 2sin2 T&!adi *#'ata as&

11

PP

tl x t l xt t

v T T

= =

22

PP

tl x t l xt t

v T T

+ += =


13/20

907=02

)(2cos)(2sin2

lTtxAY +=

tasioneorgelamplitudoA

Ax

A

p

P

.

)(2sin2

=

=

)(2cos

l

T

tAY P +=

sin 2 sin 2t l x t l x

Y A AT T

= + +


14/20

Leta* simp#l dan per#t %

L&ta" si$%+* da %&!+t $&!+%a"a "&/a*i"a -&*.stasi#&! %ada

%&$at+*a ++- /&/as.

L&ta" si$%+* "& : S 3 @ 6

P3 2 =76.?@L&ta" %&!+t "& :


15/20

S#a* Lati(a

7. T&t+"a s+d+t as& -&*#$/a- di titi" P5 i"a titi" Ot&*a( /&!-&ta! s&*a$a 7 s&"#. Ja!a" titi" P "& O 2$ '&%at !a$/at -&*#$/a- $4s da %&!i#d&-&*#$/a- ada*a( 7 s&"#

2. S&/+a( -&*#$/a- /&!a*a$ d&-a %&!sa$aasi$%a-a 0 >5>2 si 3 t C 65 di$aa 0da C da*a$ $ da t da*a$ s5 T&t+"a :

a. a!a( !a$/ata

/. F!&"+&si'. Paa- -&*#$/a-

d. K&'&%ata !a$/at -&*#$/a-

&. A$%*it+d# -&*#$/a-

. /i*a-a -&*#$/a-


16/20

8. S&+tas ta*i 0a- %aa-0a 25 $ di!&ta-"a0a- ++-0a dii"at %ada s&/+a( tia-5"&$+dia++- *ai di-&ta!"a (a!$#is d&-a !&"+&si 2H; da a$%*it+d# 7> '$. Ji"a '&%at !a$/at

-&*#$/a- da*a$ ta*i > '$4s. T&t+"a :a. A$%*it+d# -&*#$/a- stasi#&! dis&/+a( titi"0a- /&!a!a" 7825 '$ da!i titi" aa*

/. Si$%a-a -&*#$/a- %ada titi" t&!s&/+t s&t&*a(ta*i di-&ta!"a s&*a$a 72 s&"#

'. L&ta" si$%+* "& &a$ tida" t&!$as+" S>

d. Ba0a"0a %#*a -&*#$/a- stasi#&! 0a-t&!adi %ada ta*i


17/20

P&$/a(asa

7. Di"&ta(+i :

t 7 s&"# C 2 $

V $4s T 7 s&"#

Dita0a"a :

... !ad

P&0&*&saia :

=

v

xtf 2

radianf ==

= )2

1(12

4

212


18/20

P&$/a(asa

2. Di"&ta(+i :

0 >5>2 si 3 t C 6

Dita0a"a :

a. A!a( !a$/at -&*#$/a-

/. A ..... &. @ .....

'. ..... . V .....

d. " .....

P&0&*&saia :

a. Ka!&a tada did&%a C &-ati 316 da did&%a t %#siti 3 = 6

$a"a a!a( !a$/ata -&*#$/a- "& "aa

/. A >5>2 $ 2 '$ dia$/i* da!i %&!sa$aa si$%a-a

'. 2 t t 2 H;d. " 4$

&. " 2 4 @ @ 24" 75 $

. V .@ C 75 52 $4s


19/20

8. Di"&ta(+i :L 25 $ 2> '$ A 7> '$ 2 H; T s&"# V > '$4st 72 s&"#X 2> 7825 775 '$

Dita0a"a : a. As .......... /. 9 .......... '. SO ..........

d. /a0a"0a %#*a -&*#$/a- ..P&0&*&saia :@ V4 >42 2> '$

)(2sin2.

x

AAa p=)

20

!11"(2sin10.2 =pA

0#1sin.20=pA

cmAp 21022120 ==

=

20

20122cos

21

PP Ay

=

l

T

tAyb PP 2cos.

( ) ( )!12242cos210 = Py

( ) ( )+= 22cos210Py

( ) ( )2#cos210=P

y

( ) ( )cos210=Py( ) cmyP 210)1.(210 ==

'. cmSnSn $020.2

1$

2

1$

=

=

=

d. Ba0a"0a %#*a L 4 @

2>42> 72 %#*a -&*.


20/20

R&&!&si

, -isi*a SMA Bob -oster Erlangga

, ///.pra/eda."om, ///.p01si"s,222."om

215gelombang-110730234148-phpapp01 (1)

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