What is electromagnetic radiation

From our point of view the steady light we see radiating from the mains lighting is a steady light. What we see is a minimum to maximum brightness in some country's fifty and others sixty times a second. One cycle is called a Hertz ( Hz ). AC flows to a stop reverses, speeds up towards the opposite direction, slows down to a stop, to reverse direction repeating the cycle every sixty times in a second.

If we could speed up sixty times faster than the environment's second we'd be traveling though the environments time the same frequency as the mains. Technically called resonance.

From our point of view the environment's sixtieth second would have slowed down to a second of our time, and every second of the environment's time a minute of our time. We'd observe bed side lamps throbbing a color cast the whole room throbbing a minimum to maximum brightness in our every second. From the environment's point of view would we would be invisible a minute ahead in the future every second.

The peak to peak of the constantly reserving AC though the lighting source is expressed as the wavelength. It is often represented in text books as a wave form in analogue sin wave illustrations. Trigonometry plots sin wave forms thus AC.

There is always a residue of current after every reversal resulting in AC never actually zero. The peak to peak is only seventy point seven percent effective called the Root of the mean Squared. ( RMS ). The voltage of the mains is RMS the unusable peak is calculated multiplied the RMS by  one point four one four.

Digital currents travel one direction. The current  is represented as off and back on the same frequency as the analogue version. When the current switches off the residual current is falling towards zero. But when the current comes back on the falling residual current encounters the falling electric current. This is why digital can not be a perfect off and on sequence either.

Even in digital there is always a residual analogue like rising and falling sequence. The way digital is the voltages across computer chips is not effected but when the threshold of current drops switches them off represented by a binary 0. When the current resumes turns them back on represented by a binary 1. The drop out of current and the resuming of the fleeting signal occurs many times per second.

The light we see in nature made of particles called photons. In the zero resistance of out of space they travel in mass as a single waving sheet traveling as fast as just under three hundred thousand kilometers by the time we say one thousand and one equal to a second. The latter is a classical physics description of waving and vibrating photons giving light the wave like characteristics.

Quantum physics tells a different story. It appears photons disappear and reappear randomly as if by magic on a Planck scale. To science is known as tunneling in out of fabric of out of space.

A Planck scale is a tiny fraction, zero point, followed by thirty nine zeros six, two, six, a total of a forty three decimal number called a Planck constant. Scientific notation expresses such a large number as this in six, point, two, six, times ten to the minus forty three of a meter. If we brake this down equals to the same number ten to the minus forty of a millimeter.

If we relocate the same three numbers at the end of the decimal value, to the beginning of the same number of zeros is equally a Planck scale in the positive value expressed as six point two, six, times ten to the forty three of a meter. It is a reciprocal of the minus value. The two numbers are reciprocals of each other.

In other words photons disappearing and reappearing act of is six point, six, two, six times ten to the minus forty three times of second that equals a distance of six point six, two, six times ten to the minus forty three meter. The same number in the positive value is the number of times in a whole second. They are both the same numbers one positive and the other minus depending on which way you look at it.

As Isaac Newton discovered all the colors of the rainbow we see in nature is made up of light from the sun. Newton discovered glass prisms split white light into the colors he projected on a wall. We often see the same effect in oil slicks.

Colors are equally frequency related as light is. The lowest frequency our eyes and brain can see is red and the highest is a purple blue. ( Violet ). The color range of the rainbow is the threshold of a larger invisible radiation range.

The standard metric system prefix system Kilo, for a thousand, mega for a million, giga for a thousand million and tera for a billion is used for describing frequencies, Kilohertz, Megahertz, Gigahertz and Terahertz respectively. The reciprocals are the wavelengths, milli for a thousandth, micro for a millionth, nano for a thousand millionth and pico for a billionth of a meter and so on. The rainbow color range we see is between a few Megahrtz up to a few Gigahertz. The reciprocals are the wavelength a few micrometers and nanometers.

Lower frequencies than red ( a few megahertz ) threshold is inferred we can't see, inferred camas can. It is the heat bed side lamps, our bodies and everything else warm gives off. Frequencies higher than the violet threshold ( a few Gigahertz ) is also invisible to our eyes the Ultra Violet ( UV and UVA ) rays the sun gives out tanning us.

Frequencies close to the inferred range ( between micrometer and millimeter wavelengths ) are radio and television transition signals ( yes including digital), our cell phone telecommunications, text sting, internet, and radar signals. What we don't see is every time we hit a key a burst of electromagnetic radiation energy radiates from them.

The longest wavelength of the universe is believed to be the remains of the big bang that has supposed to have created the universe about a kilometer long.

The shortest wavelength ( less than a nanometer ) are gamma rays that occasionally exists in fleeting moments. The sun is capable of producing so much of it all the combined particles weigh as much as a few million tones, speeding along on a light speed scale hotter than heat of  nuclear blast.

The heat we feel from the sun ( the range includes all the colors we see of the rainbow range ) between inferred and ultra violet light. If we could see with our eyes the world, we would observe as wave upon waves of electrical energy circles moving away from all our electrical appliances.