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MODUL • Fizik TINGKATAN 5

1. Dengan menggunakan pembaris meter, lebar celah diukur, a = 0.5 cm.
By using a metre rule , the width of the slit is measured, a = 0.5 cm.
Bekalan kuasa dihidupkan. Gelombang dibekukan dengan menggunakan stroboskop mekanikal.Gelombang
dilakarkan pada skrin.
The power supply is switched on. The waves are freeze by a mechanical stroboscope. The waves are sketched on
Prosedur
Procedure the screen.
2. Dengan menggunakan protraktor, sudut bengkokan, θ diukur.
By using a protractor, the angle of bent, θ is measured.

3. Eksperimen diulang dengan menggunakan lebar celah, a = 1.0 cm, 1.5 cm, 2.0 cm dan 2.5 cm.
The experiment is repeated for width of slit, a = 1.0 cm, 1.5 cm, 2.0 cm and 2.5 cm.

Menjadualkan Saiz celah / Size of aperture, a / cm 0.5 1.0 1.5 2.0 2.5 UNIT 1
data Sudut bengkokan gelombang air
Tabulation of data Angle of bending of water waves, θ / °

Angle of bending of water wavesθ / °

Menganalisis data
Analysis of the data

Saiz celah
0 Size of aperture
a / cm

Eksperimen / Experiment
Pembelauan gelombang cahaya / Diffraction of light wave

Inferens Lebar pinggir cerah di tengah bergantung kepada saiz celah
Inference The width of the middle bright fringe depends on the size of the slit

Hipotesis Lebar pinggir cerah di tengah bertambah apabila saiz celah berkurang
Hypothesis The width of the middle bright fringe increases as the size of the slit decreases

Tujuan
eksperimen Mengkaji hubungan lebar pinggir cerah di tengah dengan saiz celah
Aim of the To investigate the relationship between the width of the middle bright fringe and the size of the slit
experiment
Pemboleh ubah dimanipulasikan / Manipulated variable:
Saiz celah / Size of slit

Pemboleh ubah bergerak balas / Responding variable:
Pemboleh ubah Lebar pinggir cerah di tengah / The width of the middle bright fringe
Variables
Pemboleh ubah dimalarkan / Constant variable:
Cahaya monokromatik (cahaya dengan satu panjang gelombang sahaja)
Monochromatic light (light of one wavelength only)

Senarai bahan
dan radas Sumber cahaya monokromatik, slaid celah tunggal, pembaris meter
List of materials Monochromatic light source, single slit slide, metre rule
and apparatus

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