Infrared Waves
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Because the human eye can only see from red to violet, infrared waves barely miss the spectrum of visible light. However, these waves can still be used for many functions on earth as well as in space. First, infrared waves are used to help you watch TV by sending a signal from the remote to the cable box. Although we cannot see these waves, we know they are being emitted from the remote because many devices such as cellphones are sensitive to the waves. A second use for infrared waves is similar to microwaves because it involves heat. Infrared waves can be used for thermal imaging because we can sense their energy as heat. Thermal energy is a critical part of exploring space as well as benefitting life on earth. In the future be sure to look for infrared waves to help predict weather forecasts, but be careful because these waves can cause overheating.