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As you can see from the illustration above, visible light is only a very small portion of all light waves. You may ask yourself why is it that we only see the "visible" portion of light? If you study the illustration above, you will see at the earth's surface almost all the wavelengths with any significant energy are visible (see the green peak). There are some very small amounts of ultraviolet and infrared wavelengths that are present. In some cases, insects and other animals have adapted to see with those wavelengths.
Dr. Biology. (2009, December 17). Light Spectrum . ASU - Ask A Biologist. Retrieved September 21, 2018 from https://askabiologist.asu.edu/spectrum-light
Dr. Biology. "Light Spectrum ". ASU - Ask A Biologist. 17 December, 2009. https://askabiologist.asu.edu/spectrum-light
Dr. Biology. "Light Spectrum ". ASU - Ask A Biologist. 17 Dec 2009. ASU - Ask A Biologist, Web. 21 Sep 2018. https://askabiologist.asu.edu/spectrum-light
The visible light spectrum humans can see is only a small part of all light wavelengths.