For those of you who think that 5G is the greatest thing since ...4G? and that it is safe..
[principia-scientific.org]
5G health issues explained: What’s wrong with the “studies”?
Author: Kurt Behnke
Category: 5G, Explained, Mobile Networks, Network Fundamentals, Wireless Technologies
27.05.2019
Introduction
In my previous post on possible health effects of radiation generated by mobile networks and mobile phones I have discussed a few fundamental facts about microwave radiation, and concluded:
Microwave radiation absorbed from mobile network towers is negligible, compared to the radiation from handheld mobile phones.
Microwave radiation levels of mobile phones have gone down since the start of digital mobile communication in the early 1990s by a factor of at least 10.
The higher the density of base station transmitters in an area, the lower the total amount of microwave radiation emitted by the phones. This is due to the tight power control on the mobile phones exercised by base stations. (An everyday experience of all of us: the better you hear your conversation partner, the lower your voice volume).
I have concluded the blog post with the observation, that none of the negative health effects of mobile phone radiation predicted by fear-mongers and alarmists since more than 20 years have been observed. Despite the partly obsessive use of mobile phones, mainly by young people since the early 2000s. Still there are claims that certain “studies” have provided clear indications that mobile phones are causing cancer.
In this article I would like to get a little bit deeper into the possible effects of microwave radiation on substances, and on living tissues in particular.
No Free Radicals in living Cells from Mobile Phone Radiation
One of the frequent alarming claims is that microwave radiation from mobile phones create so-called free radicals in body cells, which are seen as major contributors to the development of cancer. Free radicals are molecules with charged free ends, which are very aggressive when they tend to bind themselves to other molecules in their neighborhood. In order to create a free radical, you need to break a chemical bond or kick an electron out of its “home” atom hull. The same is true when you want to break or change DNA. Let us have a quick look at electromagnetic radiation to understand if that could happen as a consequence of microwave radiation.
Since over 200 years electromagnetic radiation (represented by visible light as the most “visible” section of the spectrum) has been interpreted as a wave (Huygens) and as a stream of particles (Newton) at the same time. A century old controversy, which has only been resolved in the 1940s by Quantum Electrodynamics. For our considerations we continue to live with waves and photons; no need to dive into quantum worlds.
Figure 1 below shows a wide range of the huge electromagnetic spectrum. It starts at zero Hz (oscillations per second), and goes up to and above 1020 Hz. It includes AM and FM radio waves (~100 Mega-Hertz), microwaves (300 MHz to 300 GHz), visible light (1 PHz), X-Rays, Gamma-Rays and high energy cosmic rays. You can see the mobile telephony frequency range marked in green between 300 MHz and 300 GHz. Visible light (the red-blue colored bar) is shown for comparison.
Figure 1: Electromagnetic Spectrum.[1]
For an assessment of the capability of electromagnetic radiation to break a chemical bond, or to remove an electron we need to understand how much energy a single photon of the radiation actually has and compare it with the energy of the targeted chemical bonds. It is always a single photon that breaks a bond or kicks an electron out of its “orbit”.
The energy of the photons is calculated using Planck’s formula[2]. I have done this in the table below for a range of characteristic frequencies. For convenience I have expressed the energy in Joule (J) and in electron Volts (eV).
Wave Frequency
Photon Energy (in J)
Photon Energy (in eV)
300 MHz
1.8 10-25
1.210-6
Lowest GSM frequency
3 GHz
1.8 10-24
1.2 10 -5
High LTE band
30 GHz
1.8 10-23
1.2 10-4
New Radio, 5G
3 THz
1.8 10-21
1.2 10-2
Infrared
600 THz
3.6 10-19
2.4
Visible Light
3 PHz
1.8 10-18
12
UV radiation
The energy of chemical bonds in organic molecules is between 3 and 5 eV[3]. Hydrogen bridges, which are important for three-dimensional structure of proteins, have a slightly lower energy of about 1 eV. The table very clearly tells you: Microwave radiation cannot have any impact on the chemistry of living tissues. There is no risk of degenerate cell chemistry from the use of mobile phones. To be clear: UV light and radiation of frequencies beyond do actually have the potential to impact our cell chemistry. That’s why we use sun screens and protect ourselves during X-ray.
Heating effects and SAR values explained
What else can happen? After all part of the radiation is absorbed by materials, including the phone owner’s tissues. Absorbing energy usually results in a heating effect. Heating through microwave is well known from microwave ovens. Water is particularly receptive to microwave radiation: H2O water molecules show an internal polarity which makes them each receive little quantities of the wave energy. As a consequence, the molecule starts moving faster, which is exactly what we sense and feel as heat. There is an abundant amount of water in your body tissue. Thus, if you cook a piece of meat in a microwave with 500W to 1000W, the protein will degenerate from the heat. On a side note, there is also a lot of water bound in concrete. That’s why concrete walls are shielding off microwave.
Heating can have disastrous effects. But we do already know that mobile phones generate very little amounts of radiation energy compared to the 500W of a microwave oven. For LTE smart phones the maximum allowed by the standards and by national regulations is 200mW, and this threshold will be valid for 5G, too. The typical transmission energy of a phone is much lower though, in particular when the phone is close to a base station. Technically it is still possible, that due to bad construction the phone antenna focusses part of its radiation energy on a tiny part of the user’s head. That is the reason for having the SAR thresholds. SAR stands for Specific Absorption Rate, and it measured in Watts per Kilogram. The allowed SAR is 2 (1.6 in the US). Measured SAR values for modern smart phones are as low as 0.6. With 200mW emitted by the phone, for example an SAR of 2 could mean that 10% of the energy goes into a 10 thing part of the user’s head, mainly skin and tissue close to the skin. SAR is measured by a complex procedure in specialized labs. They are using models of human skulls, containing little cells filled with liquids, and are looking for the most heated parts[4].
Making a long story short: You can calculate what the effect of a half hour phone conversation with an SAR of 2 means for the impacted human tissue: Even if the tissue is not cooled by heat diffusion and heat transport through blood and body liquids, the maximum effect would be about 0.8 degree. And realistically we will end up in the range of 0.1 – 0.3 degrees. If we consider that as something dangerous, we should hide from sunshine, avoid hot bathtubs, and refrain from any sports. Some readers may remember that their ear or head skin was feeling hot after a long phone conversation. This effect is not due to radiation exposure, but entirely and solely due to the heat from screen and battery discharge, plus the shielding from air circulation by the phone body held closely to the head.
What is wrong with all these studies?
The topic of health and Electromagnetic Radiation and (Mobile) microwave in particular certainly belongs to the most studied items in medical research. I said “most studied“, and deliberately not meant “best studied“. Out of the well over 20,000 known studies of the topic very few deserve the recognition as serious scientific work. Many have been conducted ad hoc, using awkward study design and misusing statistical formulas. And most of the “lead studies“, which are cited by mobile phone opponents are at least 20 years old; but still being merged into the current discussion.
There are many different claims of health-adverse effects. To keep this post at a manageable length, I want to focus on the two most dramatic claims: