O'Reilly logo

Strange Electromagnetic Dimensions by Louis Proud

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

1 Of Turtles, Cows, Mice, and Men

The electromagnetic spectrum

What we perceive with our eyes is but a tiny fraction of reality. This tiny fraction of reality—what’s known as visible light—occupies less than one percent of the EM spectrum. The EM spectrum is the range of wavelengths over which EM radiation extends. What we refer to as “light” is simply that portion of the EM spectrum that the human eye can detect, ranging from violet (with a wavelength of 400 nanometers [nm]) at one end to red (with a wavelength of 700 nm) at the other end. We only have to look at a rainbow in the sky, or see light pass through a prism, to know that the colors between violet and red consist of indigo, blue, green, yellow, and orange. This gives us a total of ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required