Don't Burn Your Brain E-Book

Stefan Bürger

• Herausgeber: Books on Demand
• Kategorie: Fachliteratur
• Sprache: Englisch
• Veröffentlichungsjahr: 2016

Seitenzahl: 23

Beschreibung

This booklet clearly describes EMR (electro-magnetic radiation) and RF Radiation in simple terms. He lays out what it is and how it is caused. Without panic-mongering, the author then explains whether devices like iPhones, mobile phones, iPads, tablets, microwave ovens and smart meters can be a health problem, and how to avoid over-exposure if necessary.

Leseprobe

Contents

Forward

Chapter 1

EMR/RF Basics

Wavelength

Magnetic Field

Electric Field

Alternating Power Source

Power Delivered

Maximum Exposure Level

Chapter 2

Radiation Systems In Our Lives

Microwave Oven

WLAN 2.4 GHz

Cordless Phone

Mobile Phone / Cell Phone

Smart Meters

Tablets and Notebooks

Chapter 3

How To Minimise Exposure

Mobile Phones

iPad & Tablet

Microwave Ovens

Baby Monitor

Bluetooth Headset and Google Glass

What doesn’t work or is counter-productive:

Cell phone radiation shield stickers

Shielding cover

Shielding pack

Plug-in anti-radiation devices and stickers

Bibliography

Forward

Nowadays there are many devices that generate electro-magnetic radiation (EMR) and high, radio frequency (RF) radiation. The common systems are base stations, mobile phones, microwave ovens, tablets such as iPads, WiFi-enabled laptops, game consoles and smart meters.

This booklet explains some basics about electro-magnetic radiation so that you are able to guess whether a system could be dangerous for your health or not. Complex RF theory is explained clearly and simply. Chapter 1 outlines important background information on how RF radiation and electromagnetic radiation are created as well as when and why it can be dangerous for humans.

Chapter 2 shows measurement results from typical systems at home and in the office and an interpretation of them.

In Chapter 3 some suggestions for minimising electro-magnetic exposure are made.

Chapter 1

EMR/RF Basics

How is power transported without cables?

We need a minimum of two cables to get power to a device. Regardless of whether it is powered by a battery or the 240V power socket in the wall.

In the wires connected to your device, the electric current flows towards the device and back to the source. Some of the power delivered is used in your device. For example, a solder iron will become hot, or a Hi-Fi system will play music.

As the name “electro-magnetic waves” implies, the wave has two components: an electrical field and a magnetic field.

Wavelength

Imagine placing a pendulum on a car and driving down the road at a speed (v). If you then paint the position of the pendulum on the street while the car is moving, the resulting curve is a sinus curve and the length of one wave is the wavelength λ (Lamda).

We use the same calculation to calculate the wavelength of electro-magnetic waves. The speed here is the speed of light c0=299,792,458 m/s. If an exact result is not required, we can use the rounded-up light speed: c0 ≈ 300,00 km/s.

Image 1: Wavelength of an oscillation

Magnetic Field

Maybe you did this experiment at school: