semoga bermanfaat

1. DIFFRACTION
Muhdana, Sumarni, Muh Al Ihwan couldn't
Majoring in Physics ICP 2014
Abstract
Has been done practicum, entitled " Diffraction". This experiment aims to understand the influence
distance between gap and wide gaps in the formation pattern diffraction double in the gaps, and
understood the influence many gaps toward the formation pattern diffraction, and will be able to
define wavelength laser. This experiment has four events, namely dependence diffraction double in
the gaps in the distance between a gap, in wide a gap, on the number of openings in the gaps and
diffraction single and grating. The medical equipment and materials to use the diaphragm (3, 4, and 5
number gap), laser Shanghai-Ne, lens (f=+5 and f=+50), 1 seats precision optical 1 m 460 32 and
driver 4 optical H = 60 mm / B = 36 mm460 370, 1-year low screen 441 53, 1 saddled the 300 11,
pulp and paper, and a ruler. In the first use 4 gaps and directing laser that so through diaphragmthen
measure in a way drawing pattern formation diffraction at a distance, different in the activity both use
3 gaps and drawing pattern formation diffraction at length the different holes, and the third use 5
number gap become personalised and events 4, use and lattices single gap and drawing pattern
formation diffraction on the screen with marked the pattern that has been established to crack a single
and grille and measure the distance raindrops bright center keterang next. Smaller distance between
gap, the more than formation of the pattern diffraction was formed, according to data obtained at a
distance largest formation of the pattern of |3,0 ± 0,5| 𝑚𝑚 while at the distance difraksinya smallest
pattern difraksinya formation of |12,0 ± 0,5| 𝑚𝑚 this proves that the establishment diffraction pattern
is inversely proportional with the distance between a gap, while wide gaps and there are many holes
did not have any influence on the formation pattern diffraction.
KEY WORDS : many gaps, diffraction, interference, the distance between a gap, wide gaps.
FORMULATION of PROBLEMS
1. How the influence distance between a gap to the formation of the pattern
diffraction double in the gaps ?
2. How the influence wide gaps in the formation diffraction pattern double in the
gaps?
3. How the influence of a gap toward the formation pattern diffraction?
4. How to determine the length waves laser, through testing and the lattices single
gap?
The goal
1. Students were able to understand the influence distance between a gap in the
formation pattern diffraction double in the gaps
2. Students were able to understand the influence wide gaps in the formation pattern
diffraction double in the gaps

2. 3. Students were able to understand the influence of a gap toward the formation
pattern diffraction
4. Students were able to determine the length waves laser, through testing and the
lattices single gap
METHODOLOGY EXPERIMENT
A brief theory
Diffraction is turning the light rays to some extent, that there is always face
when some waves restricted (Tipler :: 1998 , 533)
Diffraction occurs when some large waves face is restricted by barriers or
hole surface (slit). The intensity in any point in pool can be counted huygens-Fresnel
Principle by using by taking every point on the face a wave to source point and by
counting the pattern interference. The pattern franhoufer observed in the distance that
is far from barriers or slit so rays that reached almost any point in a row, or that
pattern can be observed by using a lens to focus on rays in a row on the screen
perspective that was placed in the field focus lens. The pattern, which is the pattern
Fresnel observed in the point that is close to its source. Diffraction light often
difficult to be observed because wavelength that his childhood or because the
intensity light is not enough. Except for the pattern franhoufer slit, and long-term
diffraction pattern is usually difficult to be observed.
1. Double-Slit
The pattern diffraction - interference Fraunhofer Lines two gap with the
pattern interference to two slit that dimodulasi by diffraction pattern gap - single.
Picture. 1 The scheme illustration diffraction double in the gaps
Note:
B : Wide gaps,

3. D : Distance gap
L : A gap between double-slit screen and
X2 : Maximum distance both from the center
Α2 : The observations to a maximum
Both
Δs2 : path differences sinar page
S : screen
At a distance that is far from the slot, lines of the gap to one point P on the
screen will nearly equal, and the difference track approximately d sin 𝜃, as indicated
in the picture 1 above. Thus, interference a maximum of one point that given by
D sin 𝜃 = 𝑚 𝜆, 𝑚 = 1, 2, 3 (1)
For the corners that are very small, (that almost always like that, like the assumption
previously), distance that is measured in the screen tassel light to - m given by, y m
m
Ym= m
𝜆 𝐿
𝑑
(2)
D is distance between a gap
1. Many Gap
Slit experiment In many, used bright lines that from a crossbar conventional
steel grating as a reflection. The order device is shown in the picture 2, where X is
LASER spot on the screen without grating (crossbar), Q is the point an extension
of rule, P0 is a reflection of n = 0, and P1, P2, P3 and then there was a point
diffraction rays from m = 1, m = 2, m = 3, and so on.
P
0

4. Picture 2.Source of light manokromatik
Based on the principles above, can be obtained wavelength of the LASER, where d is
the distance between the two lines in crossbar steel, namely 1 mm.
Λ (m) = (
𝑑
2𝐷2 ) (
( 𝑦𝑚2
−𝑦02 )
𝑚
) (3)
Diffraction is an event lenturan light waves that occurs when light waves
passing through slit. Diffraction light can happen if light through a single. Diffraction
in the gaps single may lead to the pattern diffraction Fraunhoufer. According to the
principles-Fresnel Principle each part a gap applied as a source the waves. Light
from one part gap can berinterferensi with light from other parts (Giancoli : 2001,
396-397)
Diffraction in the gaps narrow, when light that brought polikromatik (white
light or many color), in addition to experience the diffraction, will also be events
interference, the result interference pattern produce colors of the rainbow.
The light rays fall in the gaps single, will turn aside to corner turned θ. On the screen
will be seen pattern dark and terang.pola darkness and light will happen if, events
interferensia.
This combination of two Interference is light waves so that they formed a
new light wave. Light interference occurs when two light waves come together in
one place. Two waves can be berinterferensi if :
a. The source of light coherent, both of them must have a different phases always
remained and have same frequency.
b. Light waves must have a Second amplitude that is almost the same.
Types of interference light :
1. Interference in the gaps double
2. Minimum interference
Q
D

5. 3. Interference a maximum
4. Interference in the upper layers thin
A bundle of light in a row that slit on the front screen, but on the screen is not a
light with a widely with wide gap, but there is light, left and right side is surrounded
by a line or band darkness and light criss cross overall. This event is called
diffraction. A device optical which consists of many slit at same distance called
grating.
When a light bolt upright on a grating there will be diffraction. Diffraction can
be distinguished from the two kinds of, that is diffraction Fresnel and diffraction
Fraunhofer lines. So-called diffraction Fresnel if the distance screen grating relative
near and called diffraction Fraunhofer lines if the distance screen grating relatively
far away. Diffraction Fraunhofer Lines can also happen even though screen not
located far away, by placing a lens positive behind grating screen, and placed on the
fire lens was (a tutor : 2015, 26-27)
Medical equipment and materials
1. Diaphragm with 3 double-slit 469 84
2. Diaphragm with 4 double-slit 469 85
3. Diaphragm with 5 double-slit 469 86
4. Laser Shanghai-Ne, polarised linear 471 p. 830
5. Platform with spring clip 460 22
6. In the frame lens, f = + 5 460 01
7. In the frame lens, f = + 50 460 02
8. 1 Precision optical bench, 1 m 460 32
9. Riders 4 optic, H = 60 mm / B = 36 mm
10. 1 Screen hit 441 53
11. 1 Saddled the 300 11
The identification variables
In 1. Reliance diffraction double in the gaps in the distance to a gap.
a. The variable manipulation : The distance between a gap (mm)
b. The variable control : Distance screen with a gap (mm)
c. The response : Distance price

6. The pattern diffraction maximum near (mm)
In 2. Reliance diffraction double in the gaps in wide gaps.
a. The variable manipulation : Wide gaps (mm)
b. The variable control : Distance screen with a gap (mm)
c. The response : Distance price pattern diffraction maksimun near (mm)
In 3. Reliance diffraction in many gaps.
a. The variable manipulation : Many gaps(N)
b. The variable control : Distance screen with a gap (mm)
c. The response : Distance price diffraction pattern maximum near (mm)
In 4. Diffraction a gap single and grating.
a. The variable manipulation : Types of gap
b. The variable controls : Distance screen with a gap (mm)
c. The response : Distance price diffraction pattern maximum near (mm)
High-definition variable operation
In 1. Reliance diffraction double in the gaps in the distance to a gap.
a. The distance to a gap is a gap that one with another gap where the distance is
found in diaphragm with 4 slot (85) with 469 units mm.
b. Distance screen with a gap is the distance between screen with a gap that pass by
laser, which is measured using crossbar with units mm.
c. Distance price diffraction pattern maximum near is the distance between the
bright center with ordenya as measured by using crossbar with units mm.
In 2. Reliance diffraction double in the gaps in wide gaps.
a. Wide gap is the large gaps that used, where there are big gap in diaphragm with 3
slot (84) with 469 units mm.
b. Distance screen with a gap gap is the distance between screen with a gap that pass
by laser, which is measured using crossbar with units mm.
c. Distance price diffraction pattern maximum near is the distance between the
bright center with ordenya, which is measured using crossbar with units mm.
In 3. Reliance diffraction in many gaps.
a. Many gaps of gaps that are to be used in a diaphragm, where there are many gaps
in diaphragm with 5 slot (86) with 469 units mm.

7. b. Distance screen with a gap gap is the distance between screen with a gap that pass
by laser, which is measured using crossbar with units mm.
c. Distance price diffraction pattern maximum near is the distance between the
bright center with ordenya, which is measured using crossbar with units mm.
In 4. Diffraction a gap single and grating.
a. Types of gap that is used and in the rocks single gap many/grating
b. Distance screen with a gap gap is the distance between screen with a gap that pass
by laser, which is measured using crossbar with units mm.
c. Distance price diffraction pattern maximum near is the distance between the
bright center with ordenya, which is measured using crossbar with units mm.
Work procedures
For all the activities
1. Gap placed in front source Laser Shanghai-Ne after that set up the position L2 to
laser terpokus to screen
2. The distance to the screen, and in note
In 1 . dependence diffraction
Double-slit, in the distance between a gap (d)
1. Diaphragm( 4 double-slit 469 85) put on the path that is travelled right laser
surgery, and the pattern diffraction examined one by one double-slit and the
distance between a gap (d) = 1.00 mm, 0.50 mm, and 0.25 mm
2. Every distance d is measured to find out the influence distance between a gap with
the pattern interference
3. The Formation pattern diffraction pictures on the screen in mark pol formed
4. Distance raindrops bright center keterang next note (1,2,3 order and so on)
In 2. Reliance diffraction double-slit, in a huge gap b
1. Diaphragm( double-slit 469 84) put on the path that is travelled right laser
surgery, and the pattern diffraction examined one by one double-slit with wide
gaps (b) = 0.20 mm, 0.15 mm, and 0.10 mm
2. Every distance b is measured to find out the influence wide gaps b with patterns
interference
3. The Formation pattern diffraction pictures on the screen in mark pol formed

8. 4. Distance raindrops bright center keterang next note (1,2,3 order and so on)
In 3. Reliance diffraction double-slit, on the number of gap (N)
1. Diaphragm( 5 double-slit 469 86) put on the path that is travelled right laser
surgery, and the pattern diffraction examined one by one of 2,3,4,5 and 40
2. Every distance number gap is measured to find out the influence of a gap with the
pattern interference
3. The Formation pattern diffraction pictures on the screen in mark pol formed
4. Distance raindrops bright center keterang next note (1,2,3 order and so on)
In 4. In the gaps Diraksi single and grating
1. We use a gap single and grating, then the pattern diffraction on the screen formed
2. The Formation pattern on the screen diffraction picture with mark in the pattern
that has been established
3. Distance raindrops pusta light keterang next in order to compare (1.2 and so
forth), the results are recorded in table observation result
THEIR OBSERVATIONS and DATA ANALYSIS
OBSERVATION
Distance gap to the screen = |469,0 ± 0,5| 𝑚𝑚
In 1. Reliance diffraction double in the gaps in the distance to a gap.
Table 1. patterns in the gaps diffraction double for some distance between a gap.
No
The distance between a gap d
(mm)
Distance price diffraction pattern
maximum near (mm)
1 0,25 |12,0 ± 0,5|
2 0,50 |6,0 ± 0,5|
3 0,75 |4,0 ± 0,5|
4 1,00 |3,0 ± 0,5|
In 2. Reliance diffraction double in the gaps in the gaps wide d.
Table 2. patterns in the gaps diffraction double for some wide gaps(b).
No Wide gaps b (mm)
Distance price diffraction pattern
maximum near (mm)

9. 1 0,20 |10,0 ± 0,5|
2 0,15 |10,0 ± 0,5|
3 0,10 |12,0 ± 0,5|
In 3. Reliance diffraction in many (N)
Table 3. pattern diffraction in some gaps (N).
No Number of gap N (mm)
Distance price diffraction pattern
maximum near (mm)
1 40 |12,0 ± 0,5|
2 5 |12,0 ± 0,5|
3 4 |12,0 ± 0,5|
4 3 |12,0 ± 0,5|
5 2 |12,0 ± 0,5|
In 4. In the gaps and single Diffraction grating
Table 4 . In the gaps and single Diffraction grating.
No Types of Gap
Distance Price Diffraction patterns of Light
Central to the Order to-n (mm)
1
Single Gap
The Order I |11,0 ± 0,5|
2 The Order II |7,0 ± 0,5|
3 The Order III |6,0 ± 0,5|
4 FOURTH quarter Order |5,0 ± 0,5|
1
Gap Many/grating
The Order I |208,0 ± 0,5|
2 The Order II |209,0 ± 0,5|
3 The Order III |216,0 ± 0,5|

10. 4
FOURTH quarter Order |228,0 ±
0,5|
ANALYSIS of GRAPH
In 1. Reliance diffraction double in the gaps in the distance to a gap.
Picture 1. Graph distance relationships between a gap with the distance price
diffraction pattern
Maximum nearby.
In 2. Reliance diffraction double in the gaps in the gaps wide d.
0
0.2
0.4
0.6
0.8
1
1.2
0 5 10 15
DistanceAveragediffraction
maximumnear(mm)
Distance Inter-gap(mm)
5
10
15
20
25
30
35
40
45
50
0 0.05 0.1 0.15 0.2 0.25
Distancepricediffraction
maximumnear(mm)
The distance betweena gap (mm)

11. Picture 2. Relations Graphics wide gaps in a distance price diffraction pattern
maximum nearby.
In 3. Reliance diffraction in many (N)
Picture 3. Many gaps Graphics relationship with the distance price diffraction
pattern maximum nearby.
DATA ANALYSIS
𝜆 =
𝑦𝑑
𝐿
= 𝑦𝑑𝑙−1
∆𝜆 = |
𝜕𝜆
𝜕𝑦
|∆𝑦 + |
𝜕𝜆
𝜕𝐿
|∆𝐿 + |
𝜕𝜆
𝜕𝑑
|∆𝑑
∆𝜆 = | 𝑑𝐿−1 ∆𝑦 | + | 𝑦𝑑 𝐿−2 ∆𝐿 | + | 𝑦𝐿−1 ∆𝑑 |
∆𝜆
𝜆
=
| 𝐿−1
∆𝑦 | + | 𝑦𝐿−1
∆𝑑 |+ | 𝑦 𝐿−2
∆𝐿 |
𝑦 𝑑 𝐿−1
∆𝜆
𝜆
= |
∆𝑦
𝑦
| + |
∆𝑑
𝑑
| + |
∆𝐿
𝐿
|
∆𝜆 = (|
∆𝑦
𝑦
| + |
∆𝑑
𝑑
| + |
∆𝐿
𝐿
|) 𝜆
In 1
1.1 For 𝑑 = 0,25 𝑚𝑚
𝜆1 =
𝑦𝑑
𝐿
𝜆1 =
12 ×0,25
4690
𝜆1 = 0,0006 𝑚𝑚
0
2
4
6
8
10
12
14
0 10 20 30 40 50
Distancepricediffraction
maximumnear(mm)
The distance betweena gap (mm)

12. Δ𝜆 = |
𝛥𝑦
𝑦
+
∆𝑑
𝑑
+
∆𝐿
𝐿
| 𝜆1
Δ𝜆1 = |
0,5 𝑚𝑚
12 𝑚𝑚
+
0
0,25
+
0,5 𝑚𝑚
4690 𝑚𝑚
|0,0006 𝑚𝑚
= |0,04 + 0,0001|0,0006 𝑚𝑚
= 0,00002𝑚𝑚
𝐾𝑅 =
∆𝜆
𝜆
𝑥100 =
0,00002 𝑚𝑚
0,0006 𝑚𝑚
× 100% = 3,3 %
𝐷𝐾 = 100% − 𝐾𝑅 = 100% − 3,3 % = 96,7 PERCENT.
𝜆 1 = | 𝜆 ± ∆𝜆| = |0,000600± 0,000020| 𝑚𝑚
N
o
The distance between
a Gap (mm)
KR
(%)
The
Securit
y
Council
(%)
PF
(Mm)
1 |0,25 ± 0,5| 3.3 96.7 |0,000600± 0,000020|
2 |0,50 ± 0,5| 8.3 91.7 |0,00060 ± 0,00005|
3 |0,75 ± 0,5| 10 90 |0,00060 ± 0,00006|
4 |1,00 ± 0,5| 16.7 83.3 |0,00060 ± 0,00010|
In 2
1.1 For wide gaps b = 0,10 𝑚𝑚
𝜆1 =
𝑦𝑑
𝐿
𝜆1 =
12 ×0,25
4690
𝜆1 = 0,0006𝑚𝑚
Δ𝜆 = |
𝛥𝑦
𝑦
+
∆𝑑
𝑑
+
∆𝐿
𝐿
| 𝜆1
Δ𝜆1 = |
0,5 𝑚𝑚
12 𝑚𝑚
+
0
0,25
+
0,5 𝑚𝑚
4690 𝑚𝑚
| 0,0006 𝑚𝑚
= |0,04 + 0,0001|0,0006 𝑚𝑚 = 0,00002𝑚𝑚
𝐾𝑅 =
∆𝜆
𝜆
𝑥100% =
0,00002 𝑚𝑚
0,0006 𝑚𝑚
× 100% = 3,3 %
𝐷𝐾 = 100% − 𝐾𝑅 = 100% − 3,3 % = 96,7 PERCENT.
𝜆 1 = | 𝜆 ± ∆𝜆| = |0,000600± 0,000020| 𝑚𝑚
N
o
Wide Gaps (mm) KR
(%)
The
Securit
y
Council
(%)
PF
(Mm)

13. 1 |0,10 ± 0,5| 3.3 96.7 |0,000600± 0,000020|
2 |0,15 ± 0,5| 5.7 94.3 |0,00053 ± 0,00003|
3 |0,20 ± 0,5| 5.7 94.3 |0,00053 ± 0,00003|
In 3
1.1 For 𝑁 = 40𝑚𝑚
𝜆1 =
𝑦𝑑
𝐿
D =
1
𝑁
𝜆1 =
12
4690
×
0,25
40
𝜆1 = 0,000016 𝑚𝑚 = 1,6 . 10−5
𝑚𝑚
Δ𝜆 = |
𝛥𝑦
𝑦
+
∆𝑑
𝑑
+
∆𝐿
𝐿
| 𝜆1
Δ𝜆1 = |
0,5 𝑚𝑚
12 𝑚𝑚
+
0
0,25
+
0,5 𝑚𝑚
4690 𝑚𝑚
|1,6 . 10−5
𝑚𝑚
= |0,04 + 0,0001|1,6 .10−5
𝑚𝑚 = 0,064 .10−5
𝑚𝑚
𝐾𝑅 =
∆𝜆
𝜆
𝑥100% =
0,064 .10−5
𝑚𝑚
1,6 .10−5 𝑚𝑚
× 100% = 4 %
𝐷𝐾 = 100% − 𝐾𝑅 = 100% − 4% = 960 PERCENT.
𝜆 1 = | 𝜆 ± ∆𝜆| = |0,0640 ± 1,6000| 10−6
𝑚𝑚
N
o
Number of Gap (N) KR
(%)
The
Securit
y
Council
(%)
PF
(Mm)
1 40 4 96 |0,0640 ± 1,6000| 10−6
2 5 4 96 |0,0520 ± 1,3000| 10−5
3 4 4 96 |0,0640 ± 1,6000| 10−4
4 3 4 96 |2,00 ± 0,08| 10−4
5 2 4 96 |3,00 ± 1,20| 10−4
In 4
1. Single Gap
𝜆 =
𝑦𝑑
𝐿
= 𝑦𝑑𝑙−1
∆𝜆 = |
𝜕𝜆
𝜕𝑦
|∆𝑦 + |
𝜕𝜆
𝜕𝐿
|∆𝐿 + |
𝜕𝜆
𝜕𝑑
|∆𝑑
∆𝜆 = | 𝑑𝐿−1 ∆𝑦 | + | 𝑦𝑑 𝐿−2 ∆𝐿 | + | 𝑦𝐿−1 ∆𝑑 |
∆𝜆
𝜆
=
| 𝐿−1
∆𝑦 | + | 𝑦𝐿−1
∆𝑑 | + | 𝑦 𝐿−2
∆𝐿 |
𝑦 𝑑𝐿−1
∆𝜆
𝜆
= |
∆𝑦
𝑦
| + |
∆𝑑
𝑑
|+ |
∆𝐿
𝐿
|

14. ∆𝜆 = (|
∆𝑦
𝑦
| + |
∆𝑑
𝑑
|+ |
∆𝐿
𝐿
|) 𝜆
1.1 The order 1
𝜆1 =
𝑦𝑑
𝐿
𝜆1 =
11 ×0,6
4690
𝜆1 = 0,0014𝑚𝑚
Δ𝜆 = |
𝛥𝑦
𝑦
+
∆𝑑
𝑑
+
∆𝐿
𝐿
| 𝜆1
Δ𝜆1 = |
0,5 𝑚𝑚
11 𝑚𝑚
+
0
0,6
+
0,5 𝑚𝑚
4690 𝑚𝑚
|0,0014 𝑚𝑚
= |0,045 + 0,0001|0,0014 𝑚𝑚 = 0,00006𝑚𝑚
𝐾𝑅 =
∆𝜆
𝜆
𝑥100% =
0,00006 𝑚𝑚
0,0014 𝑚𝑚
× 100% = 4 %
𝐷𝐾 = 100% − 𝐾𝑅 = 100% − 4 % = 96 PERCENT.
𝜆 1 = | 𝜆 ± ∆𝜆| = |0,00140 ± 0,00006| 𝑚𝑚
N
o
The Order KR
(%)
The
Securit
y
Council
(%)
PF
(Mm)
1 I 4 96 |0,00140 ± 0,00006|
2 II 8 92 |0,00090 ± 0,00007|
3 III 9 91 |0,00080 ± 0,00007|
4 IV 10 90 |0,00060 ± 0,00007|
2. Gap Many / Grating
𝜆1 =
𝑦𝑑
𝐿
D =
1
𝑁
𝜆1 =
208
4690
×
1
100
𝜆1 = 0,00044 𝑚𝑚
Δ𝜆 = |
𝛥𝑦
𝑦
+
∆𝑑
𝑑
+
∆𝐿
𝐿
| 𝜆1
Δ𝜆1 = |
0,5 𝑚𝑚
208 𝑚𝑚
+
0
10−2 +
0,5 𝑚𝑚
4690 𝑚𝑚
|0,00044 𝑚𝑚
= |0,0024 + 0,0001|0,00044 𝑚𝑚 = 0.000001 𝑚𝑚
𝐾𝑅 =
∆𝜆
𝜆
𝑥100% =
0,000001 𝑚𝑚
0,00044 𝑚𝑚
× 100% = 0,2 %

15. 𝐷𝐾 = 100% − 𝐾𝑅 = 100% − 0,2 % = 99,8 PERCENT.
𝜆 1 = | 𝜆 ± ∆𝜆| = |0,004400± 0,000001| 𝑚𝑚
N
o
The Order KR
(%)
The
Securit
y
Council
(%)
PF
(Mm)
1 I 0.2 99.8 |0,0004400 ± 0,0000010|
2 II 0.2 99.8 |0,0004500 ± 0,0000010|
3 III 0.2 99.8 |0,0004600± 0,0000010|
4 IV 0.2 99.8 |0,0004900± 0,0000010|
DISCUSSION
In the activity first to know the dependence diffraction double in the gaps in the
distance between a gap, to 𝑑 = 1,00 𝑚𝑚 distance diffraction pattern that has been
established to |3,0 ± 0,5| 𝑚𝑚, for a range 𝑑 = 0,75 𝑚𝑚 pattern diffraction which is
composed of |4,0 ± 0,5| 𝑚𝑚, for a range 𝑑 = 0,50 𝑚𝑚 of pattern diffraction
formed |6,0 ± 0,5| 𝑚𝑚, and to 𝑑 = 0,25 𝑚𝑚 distance diffraction pattern that has
been established to|12,0 ± 0,5| 𝑚𝑚. According to the results showed that the
distance between a gap is inversely proportional with the distance formation of the
pattern diffraction. While in the count data analysis by counting wavelength in each
distance in a row, 𝜆 1 = |0,00060 ± 0,000020| 𝑚𝑚, , , and held𝜆 2 =
|0,00060± 0,00005| 𝑚𝑚𝜆 3 = |0,00060 ± 0,00006| 𝑚𝑚𝜆 4 = |0,00060 ±
0,00010| 𝑚𝑚 results are very close to the distance between a gap that was found
in diaphragm with 4 slot (469 85) a value of 𝜆 = 632,8 𝑛𝑚 that when converted into
units mm the results to 𝜆 = 0,0006328 𝑚𝑚 so it can be said that the trial that we are
doing in this event is true.
In the activity both to know the dependence diffraction double in the gaps in
wide gaps, to 𝑏 = 0,20 𝑚𝑚 distance diffraction pattern that has been established
to |10,0 ± 0,5| 𝑚𝑚, for a range 𝑏 = 0,15 𝑚𝑚 of pattern diffraction formed |10,0 ±
0,5| 𝑚𝑚, and to 𝑏 = 0,10 𝑚𝑚 distance diffraction pattern that has been established
to |12,0 ± 0,5| 𝑚𝑚, according to the results showed that wide gaps did not have any
influence on large-small distance diffraction pattern that has been established. While
in the count data analysis by counting wavelength with wide different holes in a

16. row, 𝜆 1 = |0,000600 ± 0,000020| 𝑚𝑚, 𝜆 2 = |0,00053± 0,00003| 𝑚𝑚,
and 𝜆3 = |0,00053± 0,00003| 𝑚𝑚.
In the activity three to know the dependence diffraction in many gaps , for
wavelength 𝑁 = 2 𝑚𝑚 diffraction, i.e. |3,00 ± 1,20| 10−4
𝑚𝑚, for wavelength 𝑁 =
3 𝑚𝑚 diffraction obtained for wavelength that diffraction that was obtained by
the |2,00 ± 0,08| 10−4
𝑚𝑚, 𝑁 = 4 𝑚𝑚|0,0640 ± 1,6000| 10−5
𝑚𝑚, for wavelength
diffraction, i.e. 𝑁 = 5 𝑚𝑚|0,0520 ± 1,3000| 105
𝑚𝑚, and for 𝑁 =
40 𝑚𝑚 wavelength diffraction, i.e. |0,0640 ± 1,6000| 10−6
𝑚𝑚, in accordance
with the result proved that many gaps did not have any influence on large-small
distance diffraction pattern that has been established.
In the activity that is to determine the wavelength laser through testing and the
lattices single gap from the I-IV, in the gaps single wavelength that we get
consecutive month from the first to the order to four with the distance |11,0 ±
0,5| 𝑚𝑚, |7,0 ± 0,5| 𝑚𝑚, |6,0 ± 0,5| 𝑚𝑚, |5,0 ± 0,5| 𝑚𝑚 yaituadalah𝜆 1 =
|0,00140 ± 0,00006| 𝑚𝑚, 𝜆 2 |0,00090± 0,00007| 𝑚𝑚, 𝜆 3 = |0,00080±
0,00007| 𝑚𝑚, 𝜆 4 = |0,00060 ± 0,00007|. While for many gaps, panajng
successive waves laser from the first to the order to four i.e. 𝜆 1 = |0,0004400±
0,0000010| 𝑚𝑚, 𝜆 1 = |0,0004500 ± 0,0000010| 𝑚𝑚, 𝜆 1 = |0,0004600±
0,0000010| 𝑚𝑚, 𝜆 1 = |0,0004900 ± 0,0000010| 𝑚𝑚.
Dbanjar" neighborhood association meetings conclude that the distance between
a gap is inversely proportional with the establishment of the pattern diffraction,
meaning the smaller distance between a gap, the more than formation of the pattern
diffraction that formed or vice versa greater distance between a gap, the more kesil
formation of the pattern diffraction that happened, while wide gaps and many gaps
did not have any influence on the formation pattern diifraksi.
The CONCLUSIONS
Based on the experiment that has been done can be concluded that
1. The distance to a gap is inversely proportional with the establishment of the
pattern diffraction, meaning the smaller distance between a gap, the more than

17. formation of the pattern diffraction that formed or vice versa greater distance
between a gap, the more small formation of the pattern diffraction that happened
2. Wide gaps did not have any influence on the formation diifraksi pattern.
3. Wide gaps did not have any influence on the formation diifraksi pattern
CAPITAL
The team building blocks. 2015. A guide Practicum Basic Physics 2. Makassar,
majoring in Physics FMIPA UNM.
Tipler, Paul A. , 1998. Physics To Science and Technology 3rd Edition Volume
2(translation). Jakarta: Erlangga
Giancoli, Dougles C, . 2001 Edition, Physics Fifth Vol. 1 (translation). Jakarta,
Erlangga