Question 1:
Diagram 1.1 and Diagram 1.2 show an experiment to study the effect of coloured filter on white light.
![](http://spmscience.blog.onlinetuition.com.my/wp-content/uploads/sites/10/2019/06/Picture2-4.png)
(a) Based on this experiment, state the colour of light observed on the white screen. Write down your answer in Table below. [2 marks]
![](http://spmscience.blog.onlinetuition.com.my/wp-content/uploads/sites/10/2019/06/Picture3-3.png)
(b) Write down
one hypothesis for this experiment
. [1 mark]
(c) State
one manipulated variable in this experiment. [1 mark]
(d) Predict the colour of light observed on the white screen if blue filter is used. [1 mark]
Answer:
(a)
![](http://spmscience.blog.onlinetuition.com.my/wp-content/uploads/sites/10/2019/06/Picture4-4.png)
(b) The colour on the screen is the same as the colour of the filter.
(c) The type of colour filter.
(d) Blue
Question 2:
Diagram 2.1 shows three coloured lights projected on a white screen.
![](http://spmscience.blog.onlinetuition.com.my/wp-content/uploads/sites/10/2019/06/Picture5-2.png)
(a) Based on the coloured lights labelled in Diagram 2.1, state
(i) a primary colour, [1 mark]
(ii) secondary colour. [1 mark]
(b) What is the colour represented by K? [1 mark]
(c) Diagram 2.2 shows a white light projected through a glass prism. [2 marks]
In Diagram 2.2, write down the colours of lights P and Q.
![](http://spmscience.blog.onlinetuition.com.my/wp-content/uploads/sites/10/2019/06/Picture6-4.png)
(d) A green filter is placed as shown in Diagram 2.3.
![](http://spmscience.blog.onlinetuition.com.my/wp-content/uploads/sites/10/2019/06/Picture7-2.png)
What colour is seen on the white screen? [1 mark]
Answer:
(a)(i) Blue/ Red/ Green
(a)(ii) Yellow
(b) White
(c)
(d) Green