141

Electromagnetic hypersensitivity is believed to be an example of a nocebo. A nocebo is a reverse placebo - one's negative expectations cause harm. EMF exposure hasn't been able to cause symptoms in blind studies. it has proved difficult to show under blind conditions that exposure to EMF can trigger these symptoms. This suggests that “electromagnetic ...


92

No, it is not true On the Wikipedia page on "Antistatic Device" there were several references to these kinds of things having been examined in a serious manner. ESD Journal It is our opinion that no currently available methods or devices exist which will effectively ground a person without a tethered cord to ground or at least a large capacitance. ...


64

Partially true, but... If we examine only part of the claim, the bit that says... "Virus and bacteria can be killed by irradiating them with electromagnetic emissions at the right frequency" ...that part is actually true. It is just that the "right frequency" in question needs to be so high that what you have is ionising radiation, that ...


53

There is Frankin's letter of Oct 1 1752 saying that the kite experiment was performed successfully in Philadelphia, which was read to and published in the Philosophical Transactions of the Royal Society a few months later. There is also Joseph Priestly's The history and present state of electricity (written about 15 years later after discussions with ...


37

Summary: yes, the area shown is reasonable, as a visualisation of the surface area of panels required to generate electricity equal to total US electricity consumption, on a multi-year average: that area of panels would generate 500 GW, which is above the current US annual average electricity consumption of 425 GW Calculations below are taken from this ...


28

The symptoms you describe are commonly referred to as electromagnetic hypersensitivity. I believe the studies you would be interested in are the following: The majority of provocation trials to date have found that self-described sufferers of electromagnetic hypersensitivity are unable to distinguish between exposure to real and fake ...


22

Yes there are people that believe they have the problem but it does not come from physical exposure from electric fields. It is usually classified as Psychogenic pain, also called psychalgia and can be treated with Cognitive behavioral therapy (ref) caused by a nocebo : The thesis examines various aspects of "electricity hypersensitivity" (EH). An ...


18

It is certainly possible to "harvest" power via induction from high voltage power lines. There is a vertical voltage drop from the wires to the ground. This effect can power stuff. For an example of this, see this (awesome) picture of a neon being lit by proximity to the power lines. source Also, this energy leakage is openly admitted by power lines ...


17

No. The types of crystals advertised as "EMF blocking" are typically inert minerals which basically have no EM-field by themselves (not magnetic and having no net charge). There is nothing stopping EM waves from reaching your body just because there is some tiny crystal on your neck or wrist or so on. Like you said you would need a sizable shield of crystal ...


16

The premise of the question is wrong and the science of electromagnetism suggests why A simple google search for images using the term "birds power lines" will show many pictures revealing birds sitting on power lines such as this one (source is here): Or, for those who think only high voltage power lines are the issue, this one (source): This ...


16

From the EagleWorks paper: The test campaign included a null thrust test effort to identify any mundane sources of impulsive thrust; however, none were identified. They are not lying, they did detect thrust, but the source of that thrust remains a mystery. The fact that the EM drive would violate Newton's third law, one of the most established ...


16

That number was mentioned in the statement of Dr William R Graham and Dr Peter Vincent Pry, chairman and chief of staff of the Commission to Assess the Threat to the United States from EMP attack. The statement quotes an article by ambassador Henry Cooper, former Director of the U.S. Strategic Defense Initiative: The result could be to shut down the U.S. ...


15

Link between Cell Towers and Cancer Elusive A quick search on cell phone towers and cancer provides many results, some state cell phone towers are dangerous because it can cause cancer, while some others state that tests regarding cell phone towers and cell phone usage are inconclusive with regards to cancer, though there are chances of increased risks in ...


15

Though tin foil hats do protect you from electromagnetic radiation and from some forms of ionizing radiation, they do not protect you from all possible electromagnetic radiation: In a not-too-serious-studyRead the conclusion first, it was found that tin foil hats actually amplify frequency bands that coincide with those allocated to the US government between ...


14

There's a bunch of claims and half-truths combined with some misapplied truths. First: Yes, electromagnetic waves can influence the nervous system. There are, for example, highly experimental treatments of Parkinson's and Tourette's using little electric pulse-givers embedded into the brain: http://www.parkinson.org/understanding-parkinsons/treatment/...


13

Another benefit is that it will block alpha radiation (helium nuclei) and most of beta radiation (electrons). You can read more here. Of course, this will have no significative benefit.


12

It is known that many animals posess the ability to sense magnetic fields (magnetoreception), a well-known example are migratory birds. Humans are generally considered to lack such a mechanism. From the article "A behavioral perspective on the biophysics of the light-dependent magnetic compass: a link between directional and spatial perception?": The ...


12

Yes. Duo labs (security vendor) says on https://duo.com/decipher/labs-presents-whats-happening-with-rfid-blocking-gear It turns out standards for testing these RFID-blocking devices actually exists since the government wants to make sure these sleeves and cards actually work before buying them for government employees and contractors. There is an actual ...


12

Yes. Some articles: one, two, three, four. In essence, chemical cloud seeding uses something like salt or silver iodide as a nucleus. Water vapor collects around such particles, eventually growing to become a water droplet that falls as rain. These methods are proven to work (see the 2008 Beijing Olympics and royal weddings as two examples), however their ...


11

In general, frosting has generally a negative effect on cooling. How much depends on the air flow in the freezer, as cold air has to reach every part of the contents easily. Frost formation Water vapour deposited from the air leads to frost formation and has a great influence on heat transfer with the following positive factors. The ...


11

Is keyless theft/relay theft a practical threat for vehicles with fob/keyless entry? Are videos demonstrating it happening practical enough? https://www.youtube.com/watch?v=bR8RrmEizVg Police in West Midlands, UK have released footage of criminals stealing a car by relaying a signal from the key inside the home, to the car in the driveway. (CNN) and ...


10

No, you can't get an electric shock from a 12V power source. The Underwrites Laboratory which regulates product safety in the US defines "hazardous voltage" as Hazardous Voltage Any voltage exceeding 42.2 Vac peak or 60 Vdc without a limited current circuit http://www.cui.com/catalog/resource/power-supply-safety-standards-agencies-and-marks.pdf. ...


10

No, it seems that low power electromagnetic fields(such as from BlueTooth devices) do not cause any significant increase in the permeability of the blood-brain barrier. Research regarding effects the low power electromagnetic fields(EMF), such as those produced by common wireless devices, is sparse. While a few studies(as mentioned in the EMFacts article) ...


9

The story is partially true. A farm shed in Rasdorf, Hesse exploded on Monday, after probably an electric spark ignited a methane gas buildup. The original story appeared in many German publications as well, but contained very few details on the actual cause, e.g. Fuldaer Zeitung. Today, the same paper printed a new article, stating that the methane buildup ...


8

The Death Penalty Information Centre describes the process (which is no longer used in the United States): For execution by the electric chair, the person is usually shaved and strapped to a chair with belts that cross his chest, groin, legs, and arms. A metal skullcap-shaped electrode is attached to the scalp and forehead over a sponge moistened with ...


8

Any basic introduction to how wireless charging works and what it requires should make it immediately apparent that none of those elements are present. For example, here's a writeup on Qi with the obvious problems bolded: Under the Qi specification, "low power" for inductive transfers denotes power deliveries below 5 W. Systems that fall within the scope ...


8

Short version This is a partial answer, as I've traced this back far enough to find significant connections to pseudo-science and basis for doubt, but I haven't found any sources that directly refute the claims, e.g. through experimental trials. This stuff appears to be pushed by Anthony Holland, who's started an organization called Novobiotronics. Holland ...


8

Notably, the body that created the fireball was initially only ~4 meters in diameter with a mass of 200,000 kg prior to atmospheric entry, traveling around 16 km/s (Brown et al. 2000). This is substantially smaller than the object that caused the airburst over Chelyabinsk (see Popova et al. 2015), which I'll discuss later. This mass was reduced prior to the ...


6

EMS is also called as Neuromuscular Electrical Stimulation (NMES) or “electromyostimulation". Muscles which perform different tasks, in addition to having different muscle architecture, respond to different electrical input. For example, skeletal muscles that play a postural role, and thus have a high proportion of slow fibers, are physiologically activated ...


Only top voted, non community-wiki answers of a minimum length are eligible