Editing Tyndall Effect (section)

== Demonstration ==

# Set the fish tank on a table and fill it 3/4 of the way with water. Slowly add milk to the water drop by drop while stirring, and use the laser pointer after each drop to make sure you get a dispersion that lets you see the laser. Set the mirror on the other side of the tank so the laser can be reflected back through.
# As students come up, let them come up and shine the laser through the solution. Ask them for ideas on why you can see the laser beam. What allows the laser to be visible?
# Have students to shine the lamp through the solution. They will see that the solution will appear blue, and the light bouncing off the mirror is red! What causes the separation of color?