Trek Magnet

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Force Field Experimentation: How Faraday Discovered Electricity without Needing Math

Anyone who has seen any version of the Star Trek saga is surely familiar with the defense shields of the Enterprise.  It is amazing how easy it is to understand both the basic concept of a force field as well as how it is adapts to a defense weapon.  The idea of a force field is probably best understood via the magnets played with as children.  Another example is electricity and how we know its power and pain to the touch, although we cannot see it.

Force fields were discovered by Michael Faraday in the 1800s.  Faraday established the building blocks for the electromagnetic field concept in physics.  He has quite the laundry list of accomplishments, including deriving the terms used in electricity, the laws of electrolysis, and the concepts that make a motor work.  He was one of Albert Einstein's icons, occupying a spot on the wall next to Isaac Newton  and James Clerk Maxwell.  The SI unit of capacitance, the farad, and the charge on a mole of electrons, the Faraday constant, are named after him.

What makes him all the more interesting?  He had little formal schooling.  Born into a working class family who could not afford higher education, he gained his knowledge and passion for electricity from reading books at the bookseller where he worked as a teenager.  Later, he worked as secretary and even valet to a physics professor in order to get closer to his passion of electricity.  Although this position was frustrating and challenging to his ambitions, he eventually was recognized for his exceptional understanding of physics and chemistry and was appointed professor of chemistry for life.

In Faraday's mind, he could "see" the "lines" that made electricity and magnetism possible.  With no mathematical background and no ability to do the calculations, he simply drew on paper what he saw in his mind.  Those drawings are still applicable today.  Faraday is also renown for his extensive experimentation.  Instead of theory, he continually experimented with new materials and new ideas to keep pace with the concepts in his mind.  He wanted to see the effects of what he imagined.  He did this both in physics and chemistry.  He even invented tools such as the future Bunsen burner when what he needed was not available.  Although he lacked the mathematical skills to underlie his experiments with calculations, he continued throughout his life to invent new concepts.  James Clerk Maxwell would eventually transcribe those experiments into math equations that are used today.

About the Author

Colette is an emerging technology writer who travels the world attending science and technology conferences to report findings and connect concept to application.

I cant get my bike computer (Trek Insight 9i ) to work properly..help?

I recently bought a bike computer for my dad. He owns a trek hybrid bike. I bought the Trek Insight 9i Series with 9 function. The directions were only pictures and gave very little help. We hooked up the magnets to the front left frame, and the smaller magnet on the spoke of the wheel an eighth of an inch away. Our problem is we cant get the computer screen to register any movement. Has anyone done this that can help?

I think it should be on the right fork, and about 1mm from the spoke magnet. And make sure there's a battery in the unit.

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