EM WAVES
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- Third, infrared. Infrared radiation (IR), also known as thermal radiation, is that band in the electromagnetic radiation spectrum with wavelengths above red visible light between 780 nm and 1 mm. Infrared waves have longer wavelengths than visible light and can pass through dense regions of gas and dust in space with less scattering and absorption. They are used for communication between devices that are not very far from each other such as in remote controls of your TV sets, etc. Infrared radiation has a longer wavelength and lower frequency than visible light. Too much exposure can damage your eyes and skin. On a global scale, trapped infrared radiation contributes to global warming.
- Fourth, visible light. The wavelengths of visible light are described as colors ranging from red (7×10^-7m) to violet (4×10^-7m). Red has 770 wavelengths with 3.90×10^14 frequency. Orange has 720 wavelengths with 4.17×10^14 frequency. Yellow has 620 wavelengths with 4.84×10^14 frequency. Green has 580 wavelengths with 5.17×10^14 frequency. Blue has 490 wavelengths with a 6.12×10^14 frequency. And violet has 390 wavelengths with a 7.69×10^14 frequency.
- Visible light is the most familiar form of electromagnetic wave. It is the only part of the spectrum that can be detected by the human eye. Visible light is used to provide both lighting and information using VLC techniques. For example, we use lighting in the room to provide the room number identification and other information about the building. Plants rely on the energy provided by visible light to power their photosynthetic cycle, allowing them to make simple sugars from components found in their environment.
- Fifth, ultraviolet rays. The wavelengths of ultraviolet (UV) rays range from 10×10^-9m to 400×10^-9. UV rays with shorter wavelengths carry more energy. High-energy radiation can damage skin cells, causing sunburn and skin cancer in humans. Since UV rays kill living cells, they are used in hospitals to sterilize equipment and kill unwanted bacteria. With even small percentages of ozone depletion, more UV-B radiation reaches the surface of the earth, and the harmful effects of UV increase.
- Sixth, X-rays. X-rays are electromagnetic waves whose wavelengths range from 0.1×10^-9m to 100×10^-9m. X-rays can easily penetrate some materials, they can damage or destroy the living tissues of an organism. X-rays are widely used for diagnostic purposes in these fields. Examples might include the observation of the broken bones and torn ligaments of football players, the detection of breast cancer in women, or the discovery of cavities and impacted wisdom teeth. X-ray is a type of electromagnetic radiation with a very short wavelength and a high frequency. These ionizing radiations can penetrate living tissues and cause cell death, chromosomal aberrations, and carcinogenic effects.
- And lastly, gamma rays. Their wavelength ranges from approximately 10^-14m slightly less than 10^-10. Gamma rays are the electromagnetic waves that have the highest energy in the electromagnetic spectrum. Gamma rays are used in medical diagnoses that involve giving a patient a radioactive chemical that emits gamma rays. Gamma rays are used in medical diagnoses that involve giving a patient a radioactive chemical that emits gamma rays. They are also used in medicine to eliminate cancer cells, kill bacteria when sterilizing instruments, and study the functions of organs. Gamma rays can damage living cells. It can cause diseases to the skin or blood, eye disorders, and cancers. That's it for today's lesson. Goodbye and thank you, students.
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