I was wondering WHY the wave nature of the magnetic field (how should one physically interpret such a wave) runs at 90 degrees of the electric field phase?<p>

*<p>[ January 19, 2005: Message edited by: JB-82-Delft ]<p>[ January 19, 2005: Message edited by: JB-82-Delft ]</p>*

Electromagnetic Radiation (EMR) is transmitted by discrete packets of energy called photons, and can be both of wave and of particle nature.

Albert Einstein was one of the first deducting that EMR consists of several quanta, (one quantum is called a photon). EMR can be created by an oscillating or accelerating charge or magnetic field. EMR consists of two perpendicular waves, an electric oscillating field at a right angle with a magnetic oscillating field. The waves have a certain frequency and the quanta have a certain density. The frequency of a quantum depicts it’s energy, the higher the frequency, the more energy it has. The density can be described as the brightness.

The visible spectrum of EMR has frequencies from about 398 to 750 THz (the visible wavelengths of EMR are from about 400 to 800 nm) and is called ‘light’.<p>All frequencies of EMR are known to have the same propagation velocity: all EMR travels at light speed (299,792458E6 m/s in vacuum).

Light in particular has the three basic properties:

- brilliance (amplitude)

- colour (frequency)

- polarization (angle of vibration)<p>EMR is in three dimensions, thus calculations with EMR involve vector equations.

In fact, the two most important formulas, which write all properties as a function of each other are:<p>These are called the Maxwell Equations, after James Clerk Maxwell who lived in the 19th century. He studied Faraday’s works, and, as Faraday did discover many things but didn’t have much knowledge of math, translated the relations Faraday found into mathematical relations.

Maxwell had a method of imagining analog systems of known behavior, i.e. he compared electromagnetic waves with a vibrating elastic medium.

He also tried to connect the electromagnetic properties with mechanical properties. He stated the following:

“All energy is the same as mechanical energy. (…) The energy in electromagnetic phenomena is mechanical energy. (…) In our theory it resides in the electromagnetic field, in the space surrounding the electrified and magnetic bodies, as well as in those bodies themselves, and is in tow different forms, which may be described without hypothesis as magnetic polarization and electric polarization.”

Electromagnetic Radiation (EMR) is transmitted by discrete packets of energy called photons, and can be both of wave and of particle nature.

Albert Einstein was one of the first deducting that EMR consists of several quanta, (one quantum is called a photon). EMR can be created by an oscillating or accelerating charge or magnetic field. EMR consists of two perpendicular waves, an electric oscillating field at a right angle with a magnetic oscillating field. The waves have a certain frequency and the quanta have a certain density. The frequency of a quantum depicts it’s energy, the higher the frequency, the more energy it has. The density can be described as the brightness.

The visible spectrum of EMR has frequencies from about 398 to 750 THz (the visible wavelengths of EMR are from about 400 to 800 nm) and is called ‘light’.<p>All frequencies of EMR are known to have the same propagation velocity: all EMR travels at light speed (299,792458E6 m/s in vacuum).

Light in particular has the three basic properties:

- brilliance (amplitude)

- colour (frequency)

- polarization (angle of vibration)<p>EMR is in three dimensions, thus calculations with EMR involve vector equations.

In fact, the two most important formulas, which write all properties as a function of each other are:<p>These are called the Maxwell Equations, after James Clerk Maxwell who lived in the 19th century. He studied Faraday’s works, and, as Faraday did discover many things but didn’t have much knowledge of math, translated the relations Faraday found into mathematical relations.

Maxwell had a method of imagining analog systems of known behavior, i.e. he compared electromagnetic waves with a vibrating elastic medium.

He also tried to connect the electromagnetic properties with mechanical properties. He stated the following:

“All energy is the same as mechanical energy. (…) The energy in electromagnetic phenomena is mechanical energy. (…) In our theory it resides in the electromagnetic field, in the space surrounding the electrified and magnetic bodies, as well as in those bodies themselves, and is in tow different forms, which may be described without hypothesis as magnetic polarization and electric polarization.”