Questions on colour
Q6. A ray of blue light falls on a glass prism as shown in the diagram.
![](colour6ANS.png)
(a) On the diagram, draw the path of the blue ray through the prism and from the prism to the screen. Use a ruler.
2 marks
(b) The blue ray is replaced by a ray of white light.
(i) What would you now see on the screen?
a spectrum ![](../../../graphics/symbols/nuclides/ticksmall.png)
1 mark
A red filter is placed between the prism and the screen.
(ii) What would you now see on the screen?
Nothing - no light would get through to the screen ![](../../../graphics/symbols/nuclides/ticksmall.png)
(iii) Explain how the red filter causes the change.
A red filter would absorb all of the blue light. ![](../../../graphics/symbols/nuclides/ticksmall.png)
2 marks
Maximum 5 marks