| Discover What Infrared is and How it | | | | photography. Nowadays, infrared is being used |
| WorksInfrared or IR radiation is | | | | by police or security industry to capture |
| electromagnetic radiation of wavelength that | | | | criminals or better protect some valuable |
| is longer than visible light, yet shorter | | | | property using infrared security |
| than microwave radiation. Infrared light was | | | | cameras.Infrared cameras produce an image of |
| discovered in the yearly 1800 by English | | | | a warm object. Warmer areas have different |
| astronomer William Herschel. The main | | | | colors than cooler ones. |
| intention was to use infrared for imaging and | | | | |