Humans are nearly blind to most wavelengths of light. Describe how you would see the world around you. Students working in small teams blow half dome bubbles with a straw on a cafeteria tray. The classroom lights above will appear as mini rainbows on the surface of the bubble. Students observe how the rainbow changes in appearance with time and with size of the bubble.
Student can graph their data from the bubble experiment.
It is recommended that teachers project the images from the computer onto a classroom screen using a overhead LCD or television screen. To facilitate a more organized and predictable large group presentation and not encounter last minute glitches that can always occur when using a computer, the following are some suggestions you might want to consider. Bookmark a selected part of the lesson such as one of the modules that you wish to use and download it onto your hard disk. This will eliminate the inconvenience of unexpectedly going off the internet. Another way to prepare is to print ahead of time selected parts of the lesson as paper copies.