6

According to the FCC depending on the frequency, a few Watts per kg absorbed RF radiation is an appropriate safety limit. Since 20 dBm corresponds to a total emitted power of 0.1 Watt, there is nothing to worry about.


5

You have three kinds of immediate radiation, alpha, beta and gamma radiation. Their penetrating power differs as well. Most of the radioactive particles from that disaster are sufficiently well handled with barriers, protective clothes, respirators. Most important here thar humans do not ingest them via air, food or fluids. But once they are inside the ...


4

This has been on peoples' minds for decades and the answer is still not clear. TL;DR at the bottom. Research done in the past has not always been of the best quality and so conclusions that might have been made which suggest harm, are probably wrong. For example: a UK study in 2005 suggested increased rates of cancer in association with distance from power-...


3

The main risk is to children and pregnant women associating with the person receiving I-131 treatment. Since I-131 is excreted in bodily fluids and taken up into the thyroid, those susceptible populations are at increased risk for thyroid cancer if they ingest contaminated bodily fluids. The person receiving the treatment is not because the cells that ...


3

Update version of the Japanese Guidelines for Gastric Cancer Screening (Japanese Journal of Clinical Oncology, 2018) Radiographic screening is recommended for population-based and opportunistic screenings as its benefits outweigh its harms (Recommendation Grade B). Endoscopic screening is also recommended for population-based and opportunistic ...


2

The Skin Cancer Foundation covers this: [A]fter the sunburn fades, lasting damage remains. Sunburn accelerates skin aging and is a leading cause in the majority of cases of basal cell carcinoma, squamous cell carcinoma and melanoma, the deadliest form of skin cancer. The later went on to say: Skin damage builds up over time starting with your very first ...


1

Nobody knows. There are three main models for the effects of low-dose radiation. The mainstream model, and the most conservative of the three, is the linear no-threshold model. It assumes that high-dose effects can be linearly extrapolated clear down to zero (that is, zero dose has zero effect, any non-zero dose carries a non-zero level of risk). The most ...


1

Tritium decays by emission of low-energy (<19 keV) electrons (and anti-neutrinos that are irrelevant here) [1]. Such particles have a very short range in matter, of the order of a few cm in air, and less than a micrometer in water [1]. These electrons are most likely stopped by whatever material houses the tritium. For instance in a watch, the light ...


1

No, they aren’t. In the area of biological effects and medical applications of non-ionizing radiation approximately 25,000 articles have been published over the past 30 years. Despite the feeling of some people that more research needs to be done, scientific knowledge in this area is now more extensive than for most chemicals. Based on a recent in-depth ...


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