1.	Light and Color
a.	When light strikes an object, the light can be reflected, transmitted, or absorbed.
b.	An opaque object is the color of the light it reflects.  A transparent or translucent object is the color of the light it transmits.
c.	When combined in equal amounts, the three primary colors of light produce white light.  As pigments are added together, fewer colors of light are reflected and more are absorbed.
d.	Key Terms
i.	Transparent material
ii.	Translucent material
iii.	Opaque material
iv.	Primary colors
v.	Secondary color
vi.	Complementary colors
vii.	Pigment 
2.	Reflection and Mirrors
a.	There are two types of reflection--regular reflection and diffuse reflection.
b.	A plane mirror produces a virtual image that is upright and the same size as the object.
c.	Concave mirrors form virtual or real images.  Convex mirrors form only virtual images.
d.	Key Terms
i.	Ray
ii.	Regular reflection
iii.	Diffuse reflection
iv.	Plane mirror
v.	Image
vi.	Virtual image
vii.	Concave mirror
viii.	Optical axis
ix.	Focal point 
x.	Real image
xi.	Convex mirror
3.	Refraction and Lenses
a.	When light rays enter a medium at an angle, the change in speed causes the rays to bend, or change direction.
b.	A convex lens can form virtual images or real images.  A concave lens can produce only virtual images.
c.	Key Terms
i.	Index of refraction
ii.	Mirage
iii.	Lens
iv.	Convex lens
v.	Concave lens
4.	Seeing Light
a.	You see objects when a process occurs that involves both your eyes and your brain.
b.	Convex lenses are used to correct nearsightedness.  Concave lenses are used to correct farsightedness.
c.	Key Terms
i.	Cornea
ii.	Pupil
iii.	Iris
iv.	Retina
v.	Rods
vi.	Cones
vii.	Optic nerve
viii.	Nearsighted
ix.	Farsighted
5.	Using Light
a.	Telescopes use lenses or mirrors to collect and focus light from distant objects.  A microscope uses a combination of lenses to produce and magnify an image.  The lens of a camera focuses light to form a real, upside-down image on film in the back of the camera.
b.	Laser light consists of light waves that all have the same wavelength, or color.  The waves are coherent, or in step.
c.	In addition to their use by stores, industry, and engineers, lasers are used to read information on compact discs, create holograms, and perform surgery.
d.	Optical fibers can carry a laser beam for long distances because the beam stays totally inside the fiber as it travels.
e.	Key Terms
i.	Telescope
ii.	Refracting telescope
iii.	Objective
iv.	Eyepiece
v.	Reflecting telescope
vi.	Microscope
vii.	Camera
viii.	Laser
ix.	Hologram
x.	Optical fiber
xi.	Total internal reflection