Modelling the Material

We will now use the computer program to create a model that is consistent with your observations. In the previous activity we saw that the IR detector card:

• was able to detect IR only after exposure to visible light
• was not effective if exposed only to red light, but is effective when exposed to other colors
• decresed its effectiveness over time when not exposed to visible light, and
• emits only a redish orange light.

Use the computer program to create an energy band model that can explain as many of these observations as possible. Sketch your model and label the energies.

Describe how your model is consistent with each of the observations listed above. If your model does not explain an observation, explain why.