Kodak has developed infrared film that works in a standard 35-mm camera.
This type of film can often be purchased at a well-stocked photography supply store.
You can set up a test experiment by selecting several different targets and photographing them in both infrared and visible light.
You'll be amazed at what develops.
Go into a dark room that has an incandescent light bulb controlled by a dimmer switch.
Observe the spectrum it produces through a diffraction grating when the light is fully turned on.
Slowly turn the dimmer switch down while observing through the grating.
What happens to the spectrum?
What connection does this have to infrared radiation?
For over 10 years, NASA has photographed Earth in the infrared range from satellites to measure long-term environmental changes.
Contact NASA (see resources) to obtain LANDSAT infrared images of your community and see how the different "heat" colors show the commercial and residential developmental pattern.
Radiometers--those things that look like light bulbs with a weather vane inside--not only measure the intensity of visible light but react to infrared as well.
Conduct an infrared survey by placing the radiometer near a variety of warm objects to see which has the most effect.
The faster the "weather vane" spins, the more intense the radiation.
(See resources for radiometers).