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1. The Electromagnetic Spectrum - Index page
- imagers.gsfc.nasa.gov
- The electromagnetic spectrum is something that is more familiar than one might think. The light that our eyes can see is actually part of the electromagnetic spectrum. This visible part of the electromagnetic spectrum consists of the colors that we see in a rainbow - from reds and oranges, through blues and purples. ...
- What are electromagnetic waves?.
- Electromagnetic waves have different wavelengths.
2. Prolonged exposure to electromagnetic fields may increase Alzheimer's risk
- www.usc.edu
- Prolonged exposure to electromagnetic fields may increase Alzheimer's risk .
- Occupational exposure to electromagnetic fields can lead to an increased risk of developing Alzheimer's disease, report USC researchers in a new study of more than 300 Southern California patients. ...
- Eugene Sobel, professor of preventive medicine and neurology, and his colleagues examined the incidence of moderate to high occupational electromagnetic force (EMF) exposure among Alzheimer's disease patients and controls. ...
- Epidemiological analysis of the patients' "primary" occupation showed that individuals who had likely been exposed to electromagnetic fields in their occupation-such as seamstresses-had nearly four times the risk of developing Alzheimer's disease than individuals who had little or no occupational EMF exposure. ...
- " Electromagnetic fields from sources like high-power electrical lines tend to expose individuals to much weaker fields than those produced by industrial sewing machines or similar equipment. ...
- "There now needs to be some testing to learn whether exposure to electromagnetic fields causes any change of amyloid-b levels in the blood," said Sobel of the hypothesis that has the potential to close some of the experimental distance between epidemiologists and biochemists. ...
- "Elevated Risk of Alzheimer's Disease among Workers with Likely Electromagnetic Field Exposure," by E. ... Chui, and "Electromagnetic Field Exposure May Cause Increased Production of Amyloid Beta and Eventually Lead to Alzheimer's Disease" by Eugene Sobel and Zoreh Davanipour, both appear in the December issue of Neurology. ...
3. Electromagnetic Waves
- www.colorado.edu
- Electromagnetic Waves.
- What are electromagnetic waves ? .
- Light, microwaves, x-rays, and TV and radio transmissions are all kinds of electromagnetic waves. ...
- Without these charged particles, there can be no electric force fields and thus no electromagnetic waves. ...
4. The Electromagnetic Spectrum
- csep10.phys.utk.edu
- The Electromagnetic.
- The electromagnetic spectrum is the distribution of electromagnetic radiation according to energy (or equivalently, by virtue of the relations in the previous section, according to frequency or wavelength). Regions of the Electromagnetic Spectrum.
- The following table gives approximate wavelengths, frequencies, and energies for selected regions of the electromagnetic spectrum. ...
- Spectrum of Electromagnetic Radiation Region.
- A graphical representation of the electromagnetic spectrum is shown in the figure below. ...
- The electromagnetic spectrum .
- They are all electromagnetic radiation; they just differ in their wavelengths. ...
5. Electromagnetic Waves
- hyperphysics.phy-astr.gsu.edu
- Electromagnetic Wave Equation.
- The wave equation for electromagnetic waves arises from Maxwell's equations. ...
- Transport of energy by electromagnetic waves.
- Electromagnetic wave concepts.
- Electromagnetic spectrum.
- Energy in Electromagnetic Waves.
- Electromagnetic waves carry energy as they travel through empty space. ...
- Electromagnetic wave concepts.
6. The Physics Classroom
- www.physicsclassroom.com
- Propagation of an Electromagnetic Waves.
- Propagation of an Electromagnetic Wave.
- Electromagnetic waves are waves which can travel through the vacuum of outer space. Mechanical waves, unlike electromagnetic waves, require the presence of a material medium in order to transport their energy from one location to another. Sound waves are examples of mechanical waves while light waves are examples of electromagnetic waves.
- Electromagnetic waves are created by the vibration of an electric charge. ... An electromagnetic wave transports its energy through a vacuum at a speed of 3. ... The propagation of an electromagnetic wave through a material medium occurs at a net speed which is less than 3. ...
- When an electromagnetic wave impinges upon the atoms of a material, the energy of that wave is absorbed. ... After a short period of vibrational motion, the vibrating electrons create a new electromagnetic wave with the same frequency as the first electromagnetic wave. ... Once the energy of the electromagnetic wave is re-emitted by an atom, it travels through a small region of space between atoms. Once it reaches the next atom, the electromagnetic wave is absorbed, transformed into electron vibrations and then re-emitted as an electromagnetic wave. While the electromagnetic wave will travel at a speed of c (3 x 108 m/s) through the vacuum of interatomic space, the absorbtion and re-emission process causes the net speed of the electromagnetic wave to be less than c. ...
- The actual speed of an electromagnetic wave through a material medium is dependent upon the optical density of that medium. ... These two factors are dependent upon the nature of the material through which the electromagnetic wave is traveling. As a result, the speed of an electromagnetic wave is dependent upon the material through which it is traveling.
7. ELECTROMAGNETIC FIELDS AND PUBLIC HEALTH: Physical Properties and Effects on Biological Systems
- www.who.int
- ELECTROMAGNETIC FIELDS AND PUBLIC HEALTH .
- Natural and many human-made sources generate electromagnetic energy in the form of electromagnetic waves. ... In order to better understand these interactions, it is essential to be familiar with the physical properties of the waves which make up the electromagnetic spectrum. ...
- Electromagnetic waves can be characterized by their wavelength, frequency, or energy. ...
- The frequency of an electromagnetic wave is simply the number of oscillations which passes a fixed point per unit of time. ...
- An electromagnetic wave consists of very small packets of energy called photons. ...
- How electromagnetic waves affect biological systems is determined partly by the intensity of the field and partly by the amount of energy in each photon. ...
- Electromagnetic waves at low frequencies are referred to as "electromagnetic fields" and those at very high frequencies are called "electromagnetic radiations". According to their frequency and energy, electromagnetic waves can be classified as either "ionizing radiations" or "non-ionizing radiations" (NIR). ...
- Ionizing radiations are extremely high frequency electromagnetic waves (X-rays and gamma rays), which have enough photon energy to produce ionization (create positive and negative electrically charged atoms or parts of molecules) by breaking the atomic bonds that hold molecules in cells together. ...
- Non-ionizing radiations (NIR) is a general term for that part of the electromagnetic spectrum which has photon energies too weak to break atomic bonds. ...
- Electromagnetic waves may produce biological effects which may sometimes, but not always, lead to adverse health effects. ...
- A biological effect occurs when exposure to electromagnetic waves causes some noticeable or detectable physiological change in a biological system. ...
- These electromagnetic fields can produce different biological effects that may lead to health consequences.
- ICNIRP has established international guidelines on human exposure limits for all electromagnetic fields, including ultraviolet (UV) radiation, visible light and infrared radiation, as well as RF fields and microwaves.
- Electromagnetic waves are generated by natural, but mostly by human-made sources. ...
8. FLO/EMC, Design Class Electromagnetic Analysis Simulation Software for EMC Compliance
- www.floemc.com
- FLO/EMC, Design Class Electromagnetic Analysis Simulation Software for EMC Compliance.
- FLO/EMC is a powerful computational electromagnetic tool for analysing electronic system enclosures and cabinets, including the effects of cables, seams and apertures. ...
- Electromagnetic Design Services Airflow Modeling Services .
9. CNN - Study: no clear proof electromagnetic fields pose health risk - October 31, 1996
- cnn.com
- Study: no clear proof electromagnetic fields pose health risk.
- "The current body of evidence does not show that exposure to these fields means electromagnetic fields present any human health hazard," said Dr. ...
- But the committee found no conclusive evidence to link electromagnetic fields with cancer, reproductive and developmental abnormalities, learning or behavior. ...
- "So far, there's no evidence that electromagnetic fields are the reason for the association. ...
- Electromagnetic fields in homes near power lines are actually lower than estimated. ...
- "What they aren't willing to say is that it is the electromagnetic field from those power lines. ...
- Congress has ordered four government laboratories to conduct a five-year, $65 million study to test whether electromagnetic fields harm nerve cells, trigger breast cancer cells or affect other biological processes. ...
10. Sensation of Hearing in Electromagnetic Fields
- homepages.tesco.net
- Sensation of Hearing in Electromagnetic Fields.
- The hearing of meteors was supposedly under conditions requiring sound to travel at a velocity far exceeding the velocity of sound in air at 343 M per second, probably approaching the velocity of electromagnetic wave propagation. ...
- From this, it appears that the electromagnetic wave effects the nervous system at the brain directly and does not use the normal auditory channels. ...
- It appears that the "hearing" of electromagnetic waves is a very broad band audio-frequency effect, that is, the audio frequencies which are "heard" from a pulsed radar seem to extend to a higher frequency that can be heard normally from a noise source and a loud speaker. ...
- They infer that the "hearing" which occurs in radar beams is caused by the pressure exerted by the electromagnetic wave, that is, twice the power density divided by the velocity being the maximum pressure when the reflection from the head is complete.
- However, they have done no work with electromagnetic waves and so can only speculate.
- It is very difficult to use electrical instruments for measurements of nerves to determine what is occurring within the head, since the measuring instruments are affected directly by the electromagnetic waves.
- It appears that indirect methods will be needed to determine the exact method by which "hearing" of electromagnetic waves takes place.
- The "hearing" of electromagnetic waves is an established fact. ...
11. Electromagnetic Hazard Therapy - Simon Best
- www.em-hazard-therapy.com
- Electromagnetic Hazard & Therapy.
- Is the only independent, regular news report in the United Kingdom, covering the research and debate on the health hazards of electromagnetic fields related to powerlines, VDUs, mobile phones/masts and microwave sources, such as radar, as well as their positive uses in orthodox and complementary medicine, including electro- and magnetotherapy. ...
- Electromagnetic Hazard and Therapy is published 6 times a year.
- Electromagnetic Hazard and Therapy.
12. FLOMERICS, Design Class Analysis Software for Electronics Cooling, Electromagnetics, Heating, Airflow and Ventilation
- www.flomerics.com
- Electromagnetic Design Services Airflow Modeling Services .
- FLO/EMC, Design Class Electromagnetic Analysis Simulation Software for EMC Compliance.
- FLO/EMC is a powerful computational electromagnetic tool for analysing electronic system enclosures and cabinets, including the effects of cables, seams and apertures. ...
- Micro-Stripes, Electromagnetic Simulation Software for Antenna and Microwave Design.
- Micro-Stripes is the world's leading electromagnetic analysis software for the microwave industry for the design and analysis of antenna and microwave devices.
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