Emphasize that this segment
concentrates on visible light which is a part of the electromagnetic
wave spectrum. Review how light carries energy in tiny packets of
electromagnetic radiation called photons. Light travels at 296,000
meters per second or 186,000 miles per second and doesn't need a medium
to travel in. All colors of light travel at the same speed, but they
have different wave frequencies (short and long waves).
Light can be reflected or refracted.
In reflection, light bounces off a surface and is diffused. Light
travels in a straight line and refraction is the bending of this light.
The light breaks up into different frequencies therefore causing a
rainbow or a "broken" look.
This activity demonstrates different
components of refracted light. If students do not know the light
spectrum, give them the following pneumonic device to help them
remember. ROY G. BIV = red, orange, yellow, green, blue, indigo and