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Questions on Light

Q16. The diagram shows a regular hexagonal glass prism. A ray of light passes through the centre of the hexagon.

(a) The diagram below shows the same prism in a different position. The ray of light is aimed at the centre of the hexagon. Complete the ray as it passes through the prism and show its direction when it emerges. Use a ruler.

2 marks

(b) A ray of light is aimed at the centre of the hexagonal prism, which is slowly rotating. Describe how the spot of light on the screen moves:

(i) as point A approaches the incident ray;

1 mark

(ii) as point A crosses the incident ray;

1 mark

(iii) as the prism continues rotating until it reaches the position shown in part (a) above.

1 mark

Maximum 5 marks