What is light?
What inventions use light?
What do these inventions reveal about the nature of light?
How do we see?

As you work through this web site, you will be reading and doing activities about light and optical systems. Each title below contains a digital learning object designed to help you understand the nature of light and appreciate the light technologies that have made our life better. It would be a good idea, but not necessary, to complete the activities in the order that they are listed. If the learning object times out, use the Refresh button in the Explorer toolbar to reload the object.
Download a question booklet for some of the applets.