Light@Cahaya
Monday, 7 January 2013
Monday, 12 December 2011
Answers : Question Section B 2
3.
|
a)
To study the relationship between the size of the shadow of an object and
the
distance between the object and the light source.
Untuk
mengkaji hubungan antara saiz bayang-bayang objek dengan
jarak di antara objek dengan sumber cahaya
(b) The distance between the object and the light source (Distance A)
Jarak di antara objek dan sumber cahaya (Jarak A) (c) 10 cm (d) The nearer the object is to the light source, the bigger the size of
the shadow formed will be.
Semakin dekat objek dengan sumber cahaya, semakin besar
saiz bayang-bayang yang akan terbentuk.
|
4.
|
(a)
The same as the shape of the ball
Sama seperti bentuk bola (b) The size of the shadow Saiz bayang-bayang (c) The position of the screen Kedudukan skrin (d) Move the ball towards the torch Gerakkan bola ke arah lampu suluh |
Answers : Question Section B 1
1.
|
(a)
To study the relationship between the distance of the source of light from
the object and the size of the shadow (b) The distance of the source of light from the object (c) 6 cm (d) The size of the shadow depends on the distance of the source of light from the object./The closer the source of light is to the object, the bigger the shadow will be. |
2.
|
(a)
Group 1: Aluminium plate; Mirror; Silver plate
Kumpulan 1: Kepingan aluminium; Cermin; Kepingan perak Group 2: Cardboard; Wooden block; Cloth Kumpulan 2: Kadbod; Bongkah kayu; Kain (b) Group 1: Good reflectors of light Kumpulan 1: Pemantul cahaya yang baik Group 2: Poor reflectors of light Kumpulan 2: Pemantul cahaya yang lemah (c) 1. Smooth Licin 2. Shiny Berkilat |
Question Section B: 2
3.
|
A group of pupils carried out an investigation to study the
relationship
between the size of the shadow of an object and the distance between the object and the light source. Sekumpulan murid menjalankan satu penyiasatan untuk mengkaji hubungan antara saiz bayang-bayang suatu objek dan jarak antara objek itu dengan sumber cahaya. The table below shows the results of the investigation. Jadual di bawah menunjukkan keputusan penyiasatan ini. (a) What is the purpose of this investigation? Apakah tujuan penyiasatan ini? __________________________________________________ __________________________________________________ [1 mark/1 markah] (b) In this investigation, what is changed (manipulated variable)? Dalam penyiasatan ini, apakah yang diubah (pemboleh ubah dimanipulasikan)? _______________________________________________ [1 mark/1 markah] (c) Predict the height of the shadow if distance A is 50 cm and distance B is 15 cm. Ramalkan ketinggian bayang-bayang jika jarak A adalah 50 cm dan jarak B adalah 15 cm. _______________________________________________ _______________________________________________ [1 mark/1 markah] (d) What conclusion can be drawn from this investigation? Apakah kesimpulan yang dapat dibuat daripada penyiasatan ini? _____________________________________________ _____________________________________________ [1 mark/1 markah] |
4.
|
A pupil carries out an investigation by using the apparatus shown in
the diagram below.
Seorang murid menjalankan satu penyiasatan menggunakan peralatan seperti yang ditunjukkan pada rajah di bawah. DIAGRAM / RAJAH (a) What is the shape of the shadow seen on the screen? Apakah bentuk bayang-bayang yang dilihat pada skrin? _________________________________________________ _________________________________________________ [1 mark/markah] (b) What is observed (responding variable) in this investigation? Apakah yang dapat diperhatikan (pemboleh ubah bergerak balas) dalam penyiasatan ini? __________________________________________________ __________________________________________________ [1 mark/markah] (c) Besides the position of the ball, what is kept the same (constant variable) in this investigation? Selain daripada kedudukan bola, apakah yang ditetapkan (pemboleh ubah dimalarkan) dalam penyiasatan ini? __________________________________________________ __________________________________________________ [1 mark/markah] (d) What can be done to increase the size of the shadow without moving the torch and the screen? Apakah yang boleh dilakukan untuk membesarkan saiz bayang-bayang tanpa menggerakkan lampu suluh dan skrin? ____________________________________________________ ____________________________________________________ [1mark/markah] |
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