Investigating reflection and refraction
1. Use a ray box, lens, and slit
2. Draw a straight line down the center of an A3 paper
3. Use a protractor to draw a line at right angles - this is the normal (N)
4. Place a glass block against the first line so the normal is near the center
5. Draw around the glass block
6. Turn off all lights in the room
7. Use the ray box to direct a ray of light to hit the block at the normal - this is the incident ray
8. Adjust the ray box to change the angle of incidence
9. Observe the reflected ray and the transmitted ray leaving the block
10. Mark the paths of the incident, reflected, and transmitted rays
11. Turn on the room lights and switch off the ray box
12. Remove the glass block and draw the incident and reflected rays
13. Draw the path of the transmitted ray through the glass block
14. Measure the angle of incidence, angle of reflection, and angle of refraction using a protractor
15. Repeat the experiment with a different material block, e.g. perspex
