1. GEOMETRIC OPTICS Light is a transverse wave made up of oscillating electric and magnetic fields. Click here to view EM wave!EM wave!

2. REFLECTION When a light wave is incident upon a reflective surface (such as a mirror), it bounces back at the same angle that it came in at (measured with the normal to the reflective surface). This is true for both Plane mirrors Spherical mirrors (concave and convex)

3. REFRACTION When light enters a transparent material it slows down. This causes the light to bend! This is true when light enters a medium through Flat surfaces (like a plane of glass) Curved surfaces (like a lens – either converging or diverging)

4. Goals for the chapter:

5. Preview … CLICK HERE FOR MIRROR/LENS RAY DIAGRAM APPLET the red arrow is the object; the blue arrow is the image of that object formed by the mirror/lens … move the red arrow around in the screen and see what happens!