Refraction of light

1 Define and use the terms normal, angle of incidence and angle of refraction

2 Describe an experiment to show refraction of light by transparent blocks of different shapes

3 Describe the passage of light through a transparent material (limited to the boundaries between two mediums only)

4 State the meaning of critical angle

5 Describe internal reflection and total internal reflection using both experimental and everyday examples

6 Define refractive index, n, as the ratio of the speeds of a wave in two different regions

7 Recall and use the equation

$$n = \frac{\sin i}{\sin r}$$