Radiation
Have you ever been to the doctor and got an X-Ray? If so, you have just been exposed to radiation. Radiation is the emission of energy from any source. Two examples of radiation are light that comes from the sun and the heat that is constantly coming off the human body. Electromagnetic spectrum is the range of wavelengths or frequencies in which electromagnetic radiation extends. The wavelengths range from low energy (low-frequency) to high energy (high-frequency). Radiofrequency radiation stands at the lower end of the electromagnetic spectrum. It contains non-ionizing radiation. Non-ionizing radiation has enough energy to move atoms around in a molecule or cause vibrations, but it does not have enough energy to ionize (remove charged particles such as electrons). Ionizing radiation has higher energy UV
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It stands at the lower end of the electromagnetic spectrum. Some examples of this type of radiation would be power lines, microwaves, radio waves, infrared radiation, visible light, and lasers. Even though this type of radiation is less harmful than ionizing radiation, overexposure to this type can cause health problems. One example of non-ionizing radiation would be extremely low frequency (ELF). This type comes from power lines and electrical wiring. Researchers have not found a link between this type of radiation and cancer, although overexposure may have a factor in health issues. Another example is radio frequency (RF) radiation. This type comes from radios, cell phones, televisions, and microwave ovens. It can affect hearing aids and pace makers, so people need to take the appropriate measures of care when around this type of radiation. Infrared (IR) radiation and Ultraviolet (UV) radiation can cause skin cancer and cataracts if overexposure begins to occur. Non-ionizing radiation is not harmful unless there is too much exposure of it, as health problems may
Chernobyl is located in the Ukraine which is about 110 kilometers north of Kiev, near Belarus border. It is a small town with amount of population about 12,500 people. There was a nuclear power station with four reactors that has been built which is located about 15 kilometers to its northwest. A 22 sq. km in size of manmade water reservoir was created in order to cool down the reactor. This power plant was using Soviet-design RBMK-1000 nuclear reactors which are said as old and outdated design. This RBMK reactor are using U-235 fuel to heat water, creating steam that spin the turbines and generate electricity. Graphite is used to controls the core reactivity and also to keep the continuous nuclear reaction occurring in the core. When the core produces more steam and bubbles, it became more reactive and creating positive-feedback loop which is called as positive-void coefficient. Compared to other design of nuclear reactor, water is used as a coolant and to moderate the reactivity of the nuclear core. When the core heats up and produces more steam, the increase in steam bubbles or voids in the water reduces the reactivity in the nuclear core. This is an important safety feature found in most reactors built in the United States and other Western nations.
Heat and x-rays are an example of radiation. A type of non-ionizing radiation is radiofrequency radiation. (Cancer 1) If radiofrequency radiation is engrossed in large amounts of materials containing water and food it can produce heat. This can lead to burns, tissue damage, and harm DNA cells. Heat is the main effect of exposure to radiofrequency. (Cancer 2)
The definition of radiation is the emission of energy electromagnetic waves or as moving subatomic particles, especially high-energy particles that cause ionization. One of the scientist who discovered radiation was Henri Becquerel, the way the French scientist discovered radioactivity was when we was conducting an experiment with uranium-bearing crystals to sun light, then put it on a photographic plate, he then had set off his experiment for a few days because it was very cloudy and the sun wasn’t shining so Henri put the sample uranium and the plate the same sealed drawer. When he went to get the uranium and photographic plate, Becquerel then discovered that the crystals left a clear image on the photographic plate, Henri wondered how that could happen because there was no energy to produce the image but Henri then discovered that a piece of mineral which contained uranium could produce its image on a photographic plate without light, Henri realized that it was radioactivity. Ernest Rutherford among his many accomplishments one of them were the way he took part in radioactivity by...
Radiation therapy is the utilization of radiation in order to treat diseases like cancer as well as to detect other ailments that someone may have. Since the development of radiation therapy many advancements have been made both to the process of using radiation itself, which in turn increased its effectiveness for medical use, and to the study of other possible uses for radiation. The concepts behind radiation therapy are not overly complicated, but they are still revolutionary ideas that have greatly impacted society and people’s wellness.
The objective of this manual is to educate the dental office staff on the basics of radiography, radiation equipment, “ALARA,” infection control, film and film processing. The information provided will help reduce the patients and staffs exposure to radiation in a dental office setting.
Radiation has always been in everyday life even before Roentgen discovered x-ray. The mountains give off natural radiation, other forms of radiation are coal burning power plants, x-rays from a TV, and an airplane ride. The average dose from background radiation is about 360 mrem every year. There are two types of radiation, nonionizing and ionizing radiation. Examples of nonionizing radiation are microwaves and radio waves broadcasting. Ionizing radiation refers to gamma and x-rays. Ionizing radiation means that the rays are able to remove an electron from the atom then ions can be formed. The ions can cause damage when reacting with other atoms. Cells are able to be repaired if low dose are received. However, if cells get a high dose, the cells will be damaged or possibly die. If the cell is damaged permanently then it is referred to as a mutated cell.
Ever since the eighth grade I have been passionate about becoming a radiation therapist. I credit this to a project in which I was required to research two professions in preparation for acceptance into a university. For this project, radiation therapy was suggested to me by a family friend whom was also the administrative director of a cancer center in Miami, Florida. Radiation therapy offers me an opportunity to help individuals who are at one of the most vulnerable and toughest periods of their life. In doing so I am able to be part of a lifesaving team which is very gratifying. Additionally, radiation therapy is a very technically demanding field that combines physics and medicine; two categories of which I am very interested in. In order to learn more about radiation therapy, I began volunteering while in high school at the C. Gordon Griffith Cancer Center at North Shore Medical Center in Miami, Florida. While there, I was able to shadow the dosimetrist as she planned treatments as well as see those treatments in action while shadowing the radiation therapists. When I started attending college at the University of South Florida, I became a volunteer at the H. Lee Moffitt Cancer
How does radiation in our environment affect us? In order to understand how radiation affects us, we first must understand how it is produced. Fission is the initial step. It is the splitting of uranium or plutonium atoms which produces radioactive "fission fragments" and "activation products" (Bertell, 1985). These products then ionize normal atoms, which leads to a sort of domino affect microscopically. This chain reaction can also cause activation products to be produced by causing chemicals in the air,...
Ultraviolet radiation is a type of energy, usually heat or light, that travels through space. The natural source of UV rays come from the sun, but it came be produced artificially through lamps and laser beams. http://science.hq.nasa.gov/kids/imagers/ems/uv.html Gamma rays are the strongest form of radiation. This is why nuclear rays are very dangerous. Gamma rays destroy human and animal tissue and cause harmful mutations. When there is a high amount of gamma rays present, it will kill any, if not all, life forms in a small amount of time. Gamma rays are a type of pure energy. They can be discovered j...
Chernobyl was the largest uncontrolled radioactive release ever recorded in history. Chernobyl was an accident that occurred while running routine checks on the Chernobyl 4 reactor on April 26, 1986. The explosion released all of its xenon gas, and about half of its iodine-131 and caesium-137 into the atmosphere. This accident resulted in tens of thousands of deaths and millions left with radiation poisoning. Chernobyl used to be prospering with a population of about 14,000; however, today it's a ghost town with a population hovering around 150 residents. Almost all the population chose to evacuate, while others took the risk in order to hold onto their memories of the once thriving town. The radiation still hovers around in the air today, still at very powerful and dangerous levels; 600,000 workers have attempted to contain the radiation levels. Chernobyl still has lasting effects today; it released record amounts of radiation, affected millions of lives, called for thousands of abortion requests, destroyed wild life, and it was a key turning point in history for nuclear safety.
Cancer has become a very common illness world wide for any age but mostly affecting adults. One can get cancer from different places in the body that is why there are so many people with cancer, because of all the different types. Cancer can affect any gender, female or male, and any age. It varies from ovarian cancer to prostate cancer, skin cancer to lukemia. Cancer has been a problem for many years yet we have not found a cure to treat and prevent cancer. If one is affected by cancer there are treatments to help take away this illness affecting their body. This essay is about a specific type of treatment for cancer, radiation therapy. There are different types of forms of particles for radiation, for example, protons and waves like x-rays and visible light. These types of radiations are grouped on how much energy they contain because it can cause different affects. A low type of energy radiation can be radio waves and heat, also known as non-ionizing radiation. Ionizing radiation has enough energy to break chemical bonds and knock electrons out of atoms, some examples of these are x-rays and ultraviolet light rays from the sun. That is why radiation is a way to treat cancer because of the strong energy it has to destroy a cancer cell, actually any cell in the body. That’s the issue with radiation therapy, is it worth the damage? It can damage any cell, wether it is healthy or cancerous, which can cause a major affect in the body later on. Although it sounds scary there are other types of treatments such as chemotherapy, targeted therapy, immunotherapy, photodynamic therapy, etc. So if radiation therapy does not sound like the best there are always other options but they do not develop the same results for radiation therapy. Rad...
Spectrum refers to the electromagnetic spectrum, which is the range of frequencies through which electromagnetic radiation travels. Electromagnetic radiation is the energy that travels at the speed of light in waves as a stream of photon particles. This form of energy encompasses radio waves, microwaves, visible, nonvisible light, X–rays and gamma rays, and these classifications are based upon the frequency at which the energy travels (see figure 1). In order to refer to a specific portion, also called a band, of the electromagnetic spectrum, one uses Hertz (Hz) as the unit of measurement.
Radiate, by definition, means to send or spread out, and this is important to know when thinking about how exactly radiation occurs. We already discussed a child coming in from playing out in the snow, snuggling up to their father and getting warm through heat transfer by conduction- physical contact. Now, let’s say that the child comes inside from out in the cold, takes off their snow gear and places their hands over a hot fire instead. The child’s hands will warm up through the transfer of heat energy through radiation. Another example, which can be seen every day that you walk outside and the sun is shining bright- is the heat received on Earth by the sun, through the means of radiation. The Earth receives heat through the electromagnetic waves, and our bodies feel the warmth of the sun from these waves that are absorbed within our skin. Radiation is the only means by which heat energy can transfer through the empty space between Earth and the sun- neither conduction or convection have the ability to play a role in this area and therefore, we can see how truly important radiation is. Another interesting fact in regards to radiation is that “because more heat is radiated at higher temperatures, a temperature change is accompanied by a color change. For example, an electrical element on a stove glows from red to orange, while the
Radiation is one of the most dangerous and easiest way of having health effects. Radiation was first discovered by Roentgen. Hazards are the first things people need to know in order to understand what it can do to your body. It causes many health effects on everyone out in the world. It harms people in the dentistry and field and even in the medical field. Normal people out the world can also be exposed when coming into one of these offices and getting x-rays of some type.
What is radioactivity? Radioactive isotopes are heavy nuclei of certain elements having extra neutrons. The extra neutrons in their nuclei cause them to be unstable so the nuclei break up spontaneously, emitting alpha, beta and gamma radiations. For example,