1. Bell Work: Snell’s Law 1.Index of refraction, symbol ____, tells you how much a substance ( speeds up / slows down ) the light. 2.Speed and “n” are ( directly / inversely / not ) related. 3.Angle of refraction and “n” are ( directly / inversely / not ) related. 4.What equation relates “n” to speed of light through a medium? 5.What equation relates “n” to θ R ?

2. Uses Mirrors Plane Bath room mirror Rear view mirror Compact Department store dressing room Dentist Ballet Studio

3. Uses Mirrors Convex Security mirror Right Side car mirror Truck extra mirror End of driveway Hospitals Busses

4. Uses Mirrors Concave Telescope Flashlight Make up mirror Flood light Head lights Optical illusion

5. Uses Lenses Plane Windows Cabinet doors Car window Basketball backboards Sliding glass doors

6. Uses Lenses Concave Near sighted glasses Peephole in front door Wide angle camera lens

7. Uses Lenses Convex Far sighted glasses (reading) Magnifying glass Telescope Projectors Cameras