Mosby items and derived items Â© 2006, 2003, 1999, 1995, 1991 by Mosby, Inc. Mosby items and derived items Â© 2006, 2003, 1999, 1995, 1991 by Mosby, Inc. Mosby items and derived items Â© 2006, 2003, 1999, 1995, 1991 by Mosby, Inc. Mosby items and derived items Â© 2006, 2003, 1999, 1995, 1991 by Mosby, Inc. Slide 5. Signs and Symptoms. ïµDisease. ïµIt is any disturbance of a. structure or function of the body. ïµIt is recognized by a set of signs. and symptoms.
The electromagnetic spectrum contains many types of waves, one of which is infrared waves. Other electromagnetic waves include gamma rays, x-rays, ultraviolet, visible light, microwaves, and radio. Infrared waves are electromagnetic radiation of a particular wavelength or color that we have named 'infrared.' They are between 700 nm (nanometers) and 1 mm. Note that 1 mm is equal to 1,000,000 nanometers. They are just beyond what our eyes can detect on the red side of the rainbow.
What is Infrared? What we typically think of as light is really electromagnetic radiation that our eyes can see. We perceive the world in the colors of the rainbow, red through violet. But these colors of light are actually a very small portion of the electromagnetic spectrum, shown below. Radio waves, infrared, ultraviolet, x-rays and gamma rays are all forms of electromagnetic radiation of varying energy. Our eyes are capable of seeing only a very narrow region of the electromagnetic spectrum, and we need special instruments to extend our vision beyond the limitations of the unaided eye. As the energy of light changes, so too does its interaction with matter.