Radiation is energy that moves from one place to another in a form that can be described as waves or particles. We are exposed to radiation in our everyday life. Some of the most familiar sources of radiation include the sun, microwave ovens in our kitchens and the radios we listen to in our cars. Most of this radiation carries no risk to our health. But some does. In general, radiation has lower risk at lower doses but can be associated with higher risks at higher doses. Depending on the type of radiation, different measures must be taken to protect our bodies and the environment from its effects, while allowing us to benefit from its many applications.
Some other examples of non-ionizing radiation include the radio waves and visible light. The visible light is a type of non-ionizing radiation that the human eye can perceive. And the radio waves are a type of non-ionizing radiation that is invisible to our eyes and other senses, but that can be decoded by traditional radios.
Examples Of Infrared Radiation In Everyday Life
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Some examples of ionizing radiation include some types of cancer treatments using gamma rays, the X-rays, and the radiation emitted from radioactive materials used in nuclear power plants (Infographic: Adriana Vargas/IAEA)
Different wavelengths of electromagnetic radiation cause different types of effects on people. For example, gamma rays are used in cancer therapy to kill cancerous cells and infrared light can be used to keep you warm.
These are just a few examples; this is not intended to be a comprehensive list. However, it is important to know that these photosensitizing effects can occur in case people are exposed to UV radiation at work. For example, an inexperienced welder, who was taking a phenothiazine anti-depressant drug, suffered damage in both eyes in the part of the retina that absorbs short wavelength light (bilateral maculopathy). He began complaining of eye problems a day after he was arc welding for two minutes without wearing any eye protection. This damage, that fortunately was reversible after several months, occurred because the drug he was taking sensitized him to the UV radiation to which he was exposed.
The most common eye disease associated with near-infrared radiation is cataracts. Prolonged exposure to IR radiation causes a gradual but irreversible opacity of the lens. Other forms of damage to the eye from IR exposure include scotoma, which is a loss of vision due to the damage to the retina. Even low-level IR absorption can cause symptoms such as redness of the eye, swelling, or hemorrhaging.
The wavelengths of radio waves range from a few millimeters (tenths of inches) to hundreds of kilometers (hundreds of miles). Visible light, for comparison, has wavelengths in the 400 to 700 nanometer range, about 5,000 times shorter than the shortest wavelength radio waves. Radio waves oscillate at frequencies between a few kilohertz (kHz or thousands of hertz) and a few terahertz (THz or 1012 hertz). "Far infrared" radiation borders radio waves along the electromagnetic spectrum and has slightly higher energy and shorter wavelengths than radio waves.
Infrared radiation (IR), sometimes referred to simply as infrared, is a region of the electromagnetic radiation spectrum where wavelengths range from about 700 nanometers (nm) to 1 millimeter (mm). Infrared waves are longer than those of visible light, but shorter than those of radio waves. Correspondingly, the frequencies of IR are higher than those of microwaves, but lower than those of visible light, ranging from about 300 Ghz to 400 THz.
The increased amounts of greenhouse gases human activities are adding to the atmosphere have upset the balance that has been in place since the end of the last ice age. Adding more greenhouse gases decreases the amount of infrared radiation energy leaving the atmosphere. To get the energy back in balance, the surface of the Earth has to warm up, so that it will emit more infrared energy, some of which will leave the atmosphere and compensate for the effect of the added greenhouse gases. Thus, the greenhouse effect, which is essential for creating the climate for life on Earth, is also responsible for the Earth getting warmer than it was before we started burning large amounts of fossil fuels.
In fact, we do this all the time: You can use electrical energy to power a light bulb, which gives off visible light, a type of radiant energy. Or you can use electricity to create heat by plugging in a space heater to generate infrared radiation.
All objects are black body radiators, the amount of radiation and position in the spectrum depends on the object temperature as well its emissivity. Some examples of blackbody radiators that emit visible light or whose radiation is used for other processes include the electric heaters, incandescent light bulbs, stoves, the sun, the stars, night vision equipment, burglar alarms, warm-blooded animals, etc.
An object that is not very hot still emits radiation, but in the infrared region. This is utilized in night vision equipment which is used to detect the infrared radiation and convert this into a visible image. This allows the detection of warm-blooded animals and people at night.
The black body radiation from animals is usually in the infrared radiation, and cannot be seen with the naked eye; however, a thermal camera can be used to see the thermal radiation from an animal. The image appears as a glowing object due to the black body radiation, unlike during the day when the person reflects the light falling on them.
The effects of visible light radiation vary according to their range and exposure. On one hand, visible light waves are responsible for life on earth, as they boost natural processes like photosynthesis. On the other hand, they can cause photodegradation and thermal damage.
WiFi is one of the most used technologies in everyday life. Whether you have a wireless router at home or you use the one at work, you are bound to connect to speedy wireless internet almost every day of the week.
If you want to ensure higher protection for you and your family against potential dangers of WiFi and Bluetooth technologies, you can employ several practices in your everyday life. Some of them include disconnecting the WiFi router at night and spend more time outside in open, natural areas.
Television radiation has been a constant part of our everyday lives since the 1950s. It is one of the oldest forms of human-made radiation, and the rise in deaths related to cancer and tumors has been widely related to it for many years now.
Again, the distance between you and the source of heavy infrared radiation is crucial. This is the reason why workers use high levels of protection, while bystanders are required to wear plastic goggles or simply look away.
The first signs of too much UV radiation are wrinkles, dry skin, spots, moles, and freckles. The damage produced by ultraviolet rays builds up during an entire lifetime, and early symptoms of damaged epidermis may only be visible at a later date.
Yes, humans give off radiation. Humans give off mostly infrared radiation, which is electromagnetic radiation with a frequency lower than visible light. This effect is not unique to humans. All objects with a non-zero temperature give off thermal radiation. And because a temperature of exactly absolute zero is physically impossible, all objects give off thermal radiation. We have to be careful here. Thermal radiation is not the exact same thing as infrared radiation. "Thermal radiation" is all the electromagnetic waves given off by an object because of its temperature, and includes radio waves, infrared waves, and even visible light. Infrared waves are only one part of thermal radiation. The two tend to get confused because most of the thermal radiation is infrared radiation for temperatures that are comfortable to humans. As an object gets hotter, the peak of its thermal radiation shifts to higher frequencies. The sun is hot enough that most of its thermal radiation is emitted as visible light and near infrared waves.
Thermal radiation only transports heat and indicates the temperature of its source. Different people at different times give off different amounts of radiation. But these differences just indicate who is hotter, and not who is fatter, taller, sadder, or more saintly. Thermal images of a person captured using an infrared camera just indicate the temperature of the person's skin, and cannot be used to diagnose diseases happening below the skin. Clothes tend to block infrared radiation, so a man with his shirt off emits more radiation than when it is on. Anybody who has tinkered with an infrared camera can attest to this fact.
Infrared radiation is non-ionizing and therefore cannot give you cancer. It's a good thing, because the rocks, trees, chairs, tables, and walls around us are constantly flooding us with a barrage of infrared radiation. For the most part, humans do not emit other forms of radiation besides thermal radiation. People often eat trace amounts of radioactive minerals that occur naturally, and they therefore give off tiny amounts of other types of radiation. For instance, Brazil nuts and bananas contain higher amounts of radioactive elements. But the amounts are too small to be noticeable or have an effect on their health. If a person has a medical scan taken that requires drinking radioactive contrast, he will emit more radiation than normal for a few hours until the contrast decays, but the amounts are still too small to have an effect on everyday life and health.
Infrared radiation (IR), or infrared light, is a type of radiant energy that's invisible to human eyes but that we can feel as heat. All objects in the universe emit some level of IR radiation, but two of the most obvious sources are the sun and fire.
IR is a type of electromagnetic radiation, a continuum of frequencies produced when atoms absorb and then release energy. From highest to lowest frequency, electromagnetic radiation includes gamma-rays, X-rays, ultraviolet radiation, visible light, infrared radiation, microwaves and radio waves. Together, these types of radiation make up the electromagnetic spectrum. 2ff7e9595c
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