Learning Goals:
The Law of Reflection governs how light bounces off a mirrored surface.
Plane, concave & convex mirrors will form images with specific characteristics (SALT).
Success Criteria: I can...
...state and apply the Law of Reflection
...draw ray diagrams for plane, concave & convex mirrors, as well as determine and state the characteristics of the images formed by each mirror.
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Now, we will begin to discuss reflection in greater detail. To begin, we will need a reflecting surface. Typically, that will be a mirror.
- incident ray - the ray of light that strikes the mirror's surface.
- reflected ray - the ray of light that bounces off the mirror's surface.
- normal - an imaginary line, perpendicular mirror's surface, at the point where the light strikes
- angle of incidence - the angle between the normal line and the incident ray (i or Ï´i).
- angle of reflection - the angle between the normal line and the reflected ray (r or Ï´r).
The Law of Reflection
The Law of Reflection states that the angle of incidence (Ï´i) equals the angle of reflection (Ï´r). The incident ray, reflected ray and the normal to the surface all lie in the same plane.
Question of the Day #8:
Using the diagram provided, answer the following:
- Which ray is the incident ray?
- Which ray is the reflected ray?
- What is the angle for A?
- What is the angle for B?
- What is the angle for C?
