GCSE questions on refraction and TIR

Q12. Nick used a ray box to shine a ray of light through air into a glass block.

He investigated how the angle of refraction varied with the angle of incidence.

The table below shows his results.

Angle of incidence in degrees	Angle of refraction in degrees
10	5
20	10
30	14
40	19
50	23
60	26
70	28
80	29

(a) Describe a method Nick could have used to obtain such results. Your answer may include a labelled diagram.

[6 marks]

(b) Here is an incomplete graph of the results:

Complete the graph - using data from the table.

Label the axes.

Plot the remaining data.

Draw a line of best fit.

[4 marks]

(Total 10 marks)