Refraction of light is when a light wave travelling changes direction because it enters a material with a different opacity than the previous one.
To perform the investigation
- Take a ray box and place it on a sheet of paper
- Place a block of glass on the paper as such that the ray can shine through the glass block
- Outline the position of the glass block
- Mark the ray of light entering and exiting the glass block
- Remove the glass block and join the the points where the light intred and exited the glass block
- Draw a normal line on the entrance of the ray and measure the angle of incidence and the angle of refraction
If the light had refracted, the angle of incidence should have been larger than the angle of refraction. i° > r°