| A | B |
| process in which light bounces off a surface | reflection |
| imaginary flat surface | plane |
| flat reflecting surface | plane mirror |
| line perpendicular to a reflecting surface | normal |
| comes from the light source and strikes the reflecting surface | incident ray |
| bounces off the reflecting surface | reflected ray |
| found between the incident ray and the normal | angle of incidence |
| found between the reflecting ray and the normal | angle of reflection |