1. Light and Its Uses

2. Reflection of Light specular (regular) reflection diffuse reflection
all light rays that hit a smooth surface are reflected at the same angle
diffuse reflection
reflected light is scattered in many directions due to a rough surface

4. Mirrors Plane (flat) mirrors flat surface left and right are reversed
give a virtual image
the image you see is where you think the light came from, not where it actually came from

6. concave mirrors
mirror curves inward
help to concentrate light on a spot called the focal point

8. convex mirrors
mirror surface curves outward
the focal point is behind the mirror
used in automobile rear-view mirrors
objects appear farther than they really are

9. concave mirror
convex mirror

10. Color
the color of an object is determined what color(s) of light are reflected
example: a red object looks red because red light is reflected

11. Refraction of Light
white light is made up of all the visible colors (ROYGBIV)
each color (wavelength) of light is refracted (bent) a different amount
prisms can separate white light into its colors (called dispersion)
red, with the longest wavelength, bends the least
violet, with the shortest wavelength, bends the most

12. may make objects appear to be in different positions

14. A Rainbow

15. Lenses transparent material that bends light to create an image
converging lens
magnifying glass
diverging lens
viewfinders in cameras

16. http://video. google. com/videoplay