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     Gobar times: Environment for Beginners

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PHYSICS  & YOU

 
smoke form cars
Worried about what you can see? Smoke from cars, dirty water, the polluted river. Yes, these are all threats to health, but what if an invisible force is bombarding your senses and bodies every second of every day? electromagnetic pollution
 
ELECTROMAGNETIC POLLUTION

In the last 50 years our environment has become a seething mass of electromagnetic smog. Mankind has changed the electomagnetic background more in these last few years than in all previous history.

Estimates vary, but most experts agree that back-ground radio-frequency electromagnetic radiation (EMR) has been increased by bewteen 100 million and 200 million times over that reaching us naturally from the sun. The human body is a master at adapting to circumstances, but there are limits! It is no wonder that so few of us ever feel really fit and well. In the modern workplace and home, the levels of EMR are considerably higher than average background levels. For example, a standard VDU emits seven different types of EMR: X-rays, ultraviolet, infrared, pulsating VLF (very low frequency), radio frequency, ELF (extremely low frequency) and static electricity. Let us now find out what electromagnetism is.

The force is…
Electromagnetic force is all around us. It is responsible for practically all the phenomena in our daily lives, with the exception of gravity, including the forces we experience in pushing or pulling material objects. Wondering how? Let me explain.

Electromagnetism, as the term suggests, is the coming together of two fields: the electric field and the magnetic field.

Electric field is produced by the presence of electrically charged particles, and electric force causes the flow of electric charge (electric current). And this flow of the electric charges or electric current produces magnetic field. A changing magnetic field produces an electric field and a changing electric field generates a magnetic field. This interdependence of the two fields brought them together as the Electromagnetic field.

It's physics…
Electromagnetic force is one of the four fundamental forces in Physics out of which all other forces are ultimately derived. The other three are strong nuclear force (which holds atomic nuclei together), the weak nuclear force (which causes certain forms of radioactive decay), and the gravitational force.

How fundamental is it?
It is an integral part of our lives. Right now, while reading this book, we are using electromagnetic waves in the form of visible light. Yes, that’s right. Light is actually “a propagating oscillatory disturbance in the electromagnetic field” or an electromagnetic wave. Visible light waves are the only electromagnetic waves we can see.
 

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