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What Is Non-Visible Light?
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A rainbow is a representation of the electromagnetic spectrum. All colors of light are made up of electromagnetic radiation and it travels in waves, some of which are visible to the human eye. Many color waves, however, are invisible to the human eye. Visible light wavelengths run from 400 nanometers for violet light to 700 nanometers which is represented by red light. There are vast amounts of the electromagnetic spectrum that are invisible to the naked eye, but even though they’re unable to be seen, they can still be potentially dangerous.
Here are types of non-visible light:
- Ultraviolet light: This light is past the violet light electromagnetic spectrum. Most of this light reflects off the ozone layer but the rays that penetrate can cause sunburn on unprotected skin.
- Infrared light: This light lies past the red end of the visible light spectrum and falls between visible light and microwave wavelengths. There is a near infrared light and a near visible red light, and far infrared light. Far infrared emits thermal energy.
- Radio waves: These light waves have the longest wavelength of all invisible light. Radio waves are used for communicating through the modification and amplification of sound waves.
- X-Rays: This light wavelength commonly used in medicine. The wavelengths penetrate the skin and form a radiographic image. Human tissue, bone and cartilage absorb most of the x-ray wavelengths.
- Microwaves: The wavelengths of microwave fall between radio and infrared waves on the electromagnetic spectrum. Microwaves excite the water molecules in food, heat them up, and pass the heat throughout the food. A microwave can harm the body because it can heat the water molecules in deep tissues.
- Gamma rays: A gamma ray emits high energy and are the most dangerous of the wavelengths on living organisms. Gamma rays come from subatomic particle interactions such as nuclear fission and nuclear fusion. Gamma rays are used in medical practices and assist in treating cancer by shrinking tumors through the use of radiation therapy.
Universe Optics offers lens design and optical lenses for industrial, medical, high tech and electronic applications.