what electromagnetic radiation is used in airport security screening?
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The Transportation Security Administration (TSA) is using body-scanning units at a number of U.S. airports. These body-scanning units traditionally use millimeter-wave technology. Millimeter-wave technology uses non-ionizing radiation in the form of low-level radio waves to scan a person's body.
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The power density for a millimeter –wave scan is between 0.00001 and 0.0006 mW/cm2 (Moulder, 2012). These scanners are believed to be less harmful to passengers because they emit nonionizing radiation and presumably do not have the potential for cancer causing DNA damage.
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Baggage Screening: In airports, luggage is scanned using x-ray scanners. Carry-on luggage passes through x-ray scanners at the security checkpoint, while checked baggage passes through x-ray or CT (Computed Tomography) scanners in secured areas of the airport.
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Suggestions for Avoiding Fogged Film. X-ray equipment used to inspect carry-on baggage uses a very low level of x-radiation that will not cause noticeable damage to most films. However, baggage that is checked (loaded on the planes as cargo) often goes through equipment with higher energy X rays.
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Infrared Remote. Investigate infrared electromagnetic radiation by using your television remote control as a source and a digital camera as a detector.
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Walk-through metal detectors (WTMDs), also called portal or personnel screening metal detectors, are devices used to screen individuals for weapons or other concealed contraband. They are used for security at checkpoints in airports, government facilities, entertainment and transportation venues, and other buildings.
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X-ray equipment used to inspect carry-on baggage uses a very low level of x-radiation that will not cause noticeable damage to most films. However, baggage that is checked (loaded on the planes as cargo) often goes through equipment with higher energy X rays.
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They looking for 'Traces of explosives'. The process is called "Swabbing". The Transportation Security Administration randomly swabs passengers' hands at checkpoints and airport gates to test them for traces of explosives.
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electromagnetic radiation, such as radio waves, microwaves, infrared, visible light, ultraviolet, x-rays, and gamma radiation (γ) particle radiation, such as alpha radiation (α), beta radiation (β), and neutron radiation (particles of non-zero rest energy)
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X-Rays are also used in airport security checks, to see inside your luggage. They are also used by astronomers - many objects in the universe emit X-rays, which we can detect using suitable radio telescopes. Lower energy X-Rays don't pass through tissues as easily, and can be used to scan soft areas such as the brain.
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A Geiger counter is an instrument used for detecting and measuring ionizing radiation.
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Gamma rays are the most energetic form of electromagnetic radiation and are produced in nuclear reactions. The form of electromagnetic radiation your eyes can detect is called ``visible'' or ``optical''.
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Cameras measure electromagnetic energy, but un- like an ideal radio receiving antenna that one might connect to a spectrum analyzer, a camera measures electromagnetic radiation only within a certain region of the electromagnetic spectrum.
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4) WiFi Uses Radio Waves Electromagnetic radiation includes everything from gamma rays to visible light to radio waves. Your laptop/tablet/etc. uses a wireless adapter to translate data into a radio signal and transmit that signal using an antenna.
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Generally, electromagnetic radiation is classified by wavelength into radio wave, microwave, infrared, visible light, ultraviolet, X-rays and gamma rays.
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Ultraviolet light has shorter wavelengths than visible light and has enough energy to kill bacteria. It can also harm the skin. X rays and gamma rays are the electromagnetic waves with the shortest wavelengths and highest frequencies. X rays are used in medicine and dentistry and to screen luggage at airports.
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Millimeter wave machines use non-ionizing radiofrequency waves to detect threats. The machine bounces the waves off the body and back to the machine. Millimeter wave scanners emit far less energy than a cell phone.