Electromagnetic Radiation Essay Research Paper Electromagnetic radiation
Electromagnetic Radiation Essay, Research Paper
Electromagnetic radiation is defined as the emanation and transmittal of energy in the signifier of electromagnetic moving ridges. An electromagnetic moving ridge consists of two moving ridges at perpendicular planes, on stand foring the electrical field while the other represents the magnetic field. This spectrum is split up into approximately 81 octaves, much like the octaves of sound, which scientists have categorized in order to picture the utility of the different properties.Theoretically, electromagnetic moving ridges can be every bit long as the expansive breadth of the existence in one moving ridge, to a wavelength the size of a quanta ( the smallest sum of energy that can be transmitted ) . That, nevertheless, is at this point in clip negligible because we either can non observe wavelengths so highly big or infinitesimally little. So by and large the spectrum is regarded to be set between 30,000,000 kilometers and.0001 As ( 1 kilometer is equal to 1 Tens 10^13 As ) . The longest and least energetic of the recognized wavelengths are radio moving ridges. Their wavelengths scope from 300,000 kilometers to 30 centimeter and a frequence of 30 kilohertzs to 3,000,000 kilohertz. The moving ridges are used in the transmittal of wireless and telecasting signals. AM and FM wireless signals fall in the long-wave wireless scope, while Television signals use the short-wave wireless scope, someplace in the 3 m wavelength. Radio moving ridges take up approximately 30 of the 81 octaves. The following somewhat more energetic and shorter wavelength is microwaves. Obviously, most are familiar with microwaves since they are ever being used to cook nutrient, but microwaves are besides used in radiotelescopes and radio detection and ranging, even the radiation from a impersonal H atom falls in this scope. Microwave scope extends from wavelengths of 30 centimeter to.3 centimeter and frequences of 1-100 billion rhythms per second. This corresponds to 6 1/2 octaves. Then comes the infrared scope. While much of the wireless spectrum base on ballss easy through our ambiance, infrared is about wholly blocked off due to soaking up by gaseous molecules that reside at that place. Infrared moving ridges are present during the transmittal of heat. It s wavelengths scope from.3 centimeter to.000076 centimeter with frequences from 100 billion ( 10^11 ) to about 10^14 rhythms per second. 12 octaves are portion of the infrared spectrum. The seeable spectrum with its individual octave is the portion of the spectrum that merely the blind are denied. The ambiance is extremely crystalline to the seeable spectrum, and is
one reason why biologists believe it is the only part of the spectrum our eyes are sensitive to. Our sun produces intense amounts of visible light, which also explains why we don t perceive the much less abundant radio wavelengths that are also impervious to our atmosphere. The visible wavelengths range from .76 microns (7600 angstroms) to .38 microns (3800 angstroms) with frequencies of slightly less than a quadrillion (10^15). Many recognize UV or ultraviolet radiation because of modern societies obsession with tanning, and the cancerous growths that may follow. UV radiation is very energetic compared to the previous categories discussed and will burn with the prolonged exposure, which tanning is a mild form of. Not much UV can get through the ozone layer, but a little does, and our polluting industrial revolution has caused our protective layer to break down allowing more UV radiation in and larger health problems to the world. It has wavelengths from 3800-100 angstroms, with frequencies from a quadrillion (10^15) to slightly less than 100 quadrillion (10^17). UV occupies about 5 octaves. X-rays, once again, are also well known to the public through their modern medical usage. They are very energetic in nature and extremely harmful to the living bodies, especially in the reproductive sites. They can easily pass through skin and reveal the underlying structure of animals. X-rays have been known to also cause cancer and even mutations. Prolonged exposure leads to radiation poisoning and certain death. It s wavelengths range from 100-.1 angstroms with frequencies of just under 10^17 to 10^20 cycles per second. It contains 10 octaves. Gamma rays are the newly discovered form of radiation that is associated with space, and is given off in reactions concerning the nuclei of atoms. These are the most energetic and shortest wavelengths that are very, very lethal. They are often called cosmic rays and so far have no practical use other than extraterrestrial observation. It s frequencies are 100 quintillion (10^20) and higher with wavelengths than 1/10th of an angstrom. Although scientists have established these arbitrary borders for the electromagnetic spectrum, there is truly no difference between them. Their only differences lie in the amount of energy they contain, their wavelengths, and their frequencies. They all behave as waves and particles, and all travel at the unerring speed of light, 300,000 Km per second.