Cell phones represent a type of technology that has been around for more than over fifty years; it has only been recently that many people began to use cell phones as a major part of their everyday life. In the past cell phones were for business people to conduct their business, but in today’s society every one owns a cell phone. Cell phones are interesting, useful and also play a major role in our life’s bringing people closer and keeping in touch with one another. Most people do not know and understand the physics of a cell phone. Cell phones are also known as cellular phone, hand phone, and commonly known as a mobile phone. A cell phone is an electric device that can make and receive calls, over and automatic repeat request (radio link …show more content…
High frequency to -------------------------------------------------------------------> Long wave length
Electromagnetic Spectrum:
Radio Waves:
How they are made:
Radio waves are made by a range of transmitter, depending on its wavelengths. They are also given off by stars, sparks and lightening that is why you can hear interference on your radio while in a thunderstorm.
Uses:
Radio waves are the lowest frequencies in the electromagnetic spectrum, and are mainly used for communications with others.
Dangers:
Large doses of radio waves are believed to be dangerous it can cause you cancer, leukaemia and many other dangerous and fatal disorders which can cause you death. Some people have said that the very low frequency field from overhead power cables near their homes has affected their health.
Cell phone antennae are not directional. Waves transmit in all directions, including your body
The visible spectrum is the portion of the electromagnetic spectrum that is visible to (can be detected by) the human eye. Electromagnetic radiation in this range of wavelengths is called visible light or simply light. http://www.edinformatics.com/math_science/electromagnetic_spectrum.htm
Report: For cell phones are not dangerous?
Cell phones expose us to a form of electromagnetic called radio frequency energy.
Light waves are a form of electromagnetic waves, which consist of patterns of electric and magnetic energy. The visible spectrum is only a small part of the electromagnetic spectrum-the
4. Radio: most common form of wireless transmission, typical of home routers and most wireless devices to use this form. Infared uses low frequency light waves to carry data using line-of-sight.
There are many different types of radios that have various uses. The Crystal radio was the first radio product to be sold. It only cost six dollars when it was first made (mortaljourney.com). The crank radio and the solar powered radio run on different sources of power than just batteries. Crank radios can access news and weather reports any where at any time by just turning the handle on the side of the radio. Like wise, the solar powered radio is available when it has been charged by the sun. The batteries stay charged for a long time (crank-radio-review.com). During the 1920s radios in pieces of furniture were the very popular to make the radio look like a piece of their homes.
Nearly everyone is using cell phones in their day routine lives. Cell phones have now become less of a novelty and more of a communication tool providing many utilities all in one package, from camera, video games, internet and apps; they combine business and personal convenience.
The Radio was introduced to society because of the telegraph and the telephone. These inventions don’t do the same things but their similar branch of technology. “Radio technology began as “wireless telegraphy”. “It all started with the discovery of radio waves, electromagnetic waves that have the capacity to transmit music, speech, pictures and other data invisibly through air.” [Bellis] Majority of technology uses electromagnetic waves to send data information or TV broadcasts. During the 1860’s, Scottish physicist, James Clerk Maxwell predicted the existence of radio waves; and in 1886, German physicist, Heinrich Rudolph Hertz showed how fast the variation of electric current could be placed into space in the form of
the electromagnetic spectrum order is Radio waves, microwaves, infrared rays, visible light rays, ultraviolet rays, x rays, and gamma rays. the order is in order of wavelength, radio waves have the longest wave length and gamma rays have the shortest wave length. Each of these types of rays have different and very important purposes. Radio waves are used mostly for communications, microwaves are used to cook, radars, cellphones etc, infrared rays are used for their heat you could use them in controls thermal imaging, alarm systems and more. visible light is obviously used to see things such as printers and cds, ultraviolet rays are used to sterilize produce vitamin d etc.xrays are used to see inside people and things and lastly gamma rays are used to kill cancer cells. as helpful as all these can be they do have some harmful aspects. Large doses of radio waves are believed to cause cancer, leukaemia and other disorders, microwaves are known to cause cataracts in your eyes, infra red has a possibility of making humans overheat, with visible light Too much light can damage the retina in your eye. uv rays can cause sunburn skin cancer and damage in retna , x rays can cause cancer and cell damage and lastly gamma rays could cause cell damage and mutations. there is also a different type of ray on the electromagnetic spectrum and it has the smallest wave length its called cosmic radiation it is used in outer space and
The sun produces electromagnetic radiation of all wavelengths, with the visible spectrum being the most intense wavelength range produced as the radiation peaks at this area of the EM spectrum. The Earth’s atmosphere absorbs most of this radiation but light and radio waves are able to penetrate the atmosphere, as well as short wavelength infrared rays and long wavelength microwaves. X-rays and gamma rays are absorbed by the Earth’s upper atmosphere.
Radiofrequency energy is a type of electromagnetic radiation. It is currently used in cell phones, and there is some concern in this area because radiofrequency energy has the potential to cause cancer. In cell phones, the radiofrequency energy is emitted from their antennas. The tissues closest to the antenna are able to absorb this energy, and because we generally hold our cell phones in our hands or to our faces, that would mean that radiofrequency energy would be absorbed by our faces or hands. This problem would not be as large if it was not for the fact that the number of cell phone users in just the United States has nearly tripled in the last fourteen years, going from 110 million users to 327.5 million, as estimated by the Cellular
The cell phone has transformed over the years, changing from a bulky phone to a compact device containing the capabilities of a computer. According to Russell Ware, a cell phone is “any portable telephone which uses cellular network technology to make and receive calls.” A cell phone works through a maze of cellular towers that cross the world. This connects mobile devices that allow texting and calling between two cellular devices. Motorola produced the first commercially available cell phone which officially went on sale in 1984 (Ware). This cell phone was called the DynaTAC 8000x which cost an extreme amount of money and only contained a battery of 30 minutes (Ware). Since this first masterpiece, the cell phone has advanced and developed into an entirely new object. Cell phones today contain the ability to text, call, use the internet, play games, and store files (Cell Phone).
First radiofrequency radiation, RFR, which is emitted from the cell phones can cause cancer and other health issues (Karaca). Health issues with cell phones have been debated since the cell phone was made. Other electrical items related to cell phones all have RFR, but all of them emit it safely even back to 1893. This also tells us that cell phones safely use RFR. But (IARC) is aware of cell phones being "possibly carcinogenic to humans” which means that RFR has some chance of generating cancer cells
All over the world em waves are being used. One place where they use this is in the military. Where they use them on their missions to get what they need. It is really helpful to the rangers to have these gadgets that have waves. If they did not have these devices it would be way
However there had done others study that express the connection between cell phones and different types of biological damage to human body. For example The European Journal of Scientific Research conducted a lab experiment with normal human astrocytes, an LG Verizon cell phone and MRET-Nylon chip. The experiment revealed that normal human astrocytes cell that were exposed to cell phone radiation at a room temperature without the MRET-Nylon chip decreased by 20% less . Igor Smirnov is one of the author of this experiment and he stated on his article that "It is well documented that cell phones, which emit electromagnetic fields in the radio frequency range, can cause DNA damage, headaches, blurred vision, dizziness,fatigue, short term memory loss, neuralgias, tumors, sleep disturbances, aberrant brain wave activity and changes to cerebral blood flow, including altering the permeability of the blood brain barrier" (Smirnov, 2009). Smirnov statement and finding about the emission of electromagnetic wave from cell phones gives a lot to think. Even-tough it's a small amount of radiation that is being emitted from cell-phones, because they are held very close to the head at the end of a long term usage the risk of brain cancer and others health problems will
In an effort to address the issue of radio frequency radiation exposure in this community, we will provide a background on the sources of radio frequency radiation as well as the known and suspected health effects. We will also proposed two epidemiological studies and discuss risk management and
My purpose is to provide information on cell phone radiation, the risks that can be caused by cell phone radiation, and the potential health problems that could result from this.
The good news is that there are a few simple solutions that help in lowering one’s risk of exposure to radiation. First of all, holding the phone away from the face and using the speaker phone instead leads to ten thousand times less exposure. In addition, using a wired headset gives less exposure into the ear. Secondly, since carrying the phone in one’s pocket leads to exposure to his or her bone marrow, one should simply keep the phone off. Lastly, the weaker the signal in the phone, the more the radio frequency signal has to enhance itself to get into the phone; thus, one should avoid using the phone if it appears to have a weak signal. Basically, one gets greater exposure to radiation with a weaker signal. Indeed, it is never too late to prevent oneself from such hazards.