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MODUL • Fizik TINGKATAN 5

Pemboleh ubah dimanipulasikan / Manipulated variable:
Sudut tuju / Angle of incidence
Pemboleh ubah Pemboleh ubah bergerak balas / Responding variable:
Variables Sudut biasan / Angle of refraction
Pemboleh ubah dimalarkan / Constant variable:
Indeks biasan / Refractive index

Senarai bahan
dan radas Blok kaca, kotak sinar, kertas putih, protraktor, bekalan kuasa
List of materials Glass block, ray box, white paper, protractor, power supply
and apparatus
Kotak sinar
Ray box

N
UNIT 1
i
A O B
Susunan radas
Arrangement of the
apparatus r

D C
P

Q

1. Blok kaca diletakkan di atas sehelai kertas putih. Bentuk bongkah kaca dilakarkan di atas kertas putih dan
dilabelkan ABCD. Bongkah kaca dialihkan.
The glass block is placed on a piece of white paper. The outline of the sides of the glass block are traced on the
white paper and labelled as ABCD. The glass block is removed.
2. Garis normal ON dilukis. Dengan menggunakan protraktor, sudut tuju diukur, i = 10°.
Bongkah kaca diletakkan semula di atas lakaran itu. Alur cahaya dari kotak sinar di tujukan pada sudut i itu.
Alur yang terbias dari CD dilukis sebagai PQ. Blok kaca dialihkan semula. Satu garisan OP dilukis.
Prosedur The normal ON is drawn. By using a protractor, the angle of incidence is measured, i = 10°.
Procedure
The glass block is placed again on its outline on the paper. A ray of light from the ray box is directed along the
incidence line. The ray emerging from the side CD is drawn as line PQ. The glass block is removed again. The
points O and P are joined by a line and is drawn as line OP.
3. Sudut biasan, r diukur dan direkodkan. / The angle of refraction, r, ray is measured and recorded.
4. Eksperimen diulangi dengan sudut tuju, i = 20°, 30°, 40°, 50°.
The experiment is repeated for angles of incidence i = 20°, 30°, 40°, 50°.

Menjadualkan Sudut tuju / Angle of incidence, i / ° 10° 20° 30° 40° 50°
data
Tabulation of data Sudut biasan / Angle of refraction, r / °

Sudut biasan
Angle of refraction
r / °

Menganalisis data
Analysis of the data

Sudut tuju
Angle of incidence
0 i / °

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