when and where was the electomagnetic field
It depends what you are talking about... Electromagnetic field Electromagnetic force Electromagnetic radiation Electromagnetic spectrum Electromagnetic therapy Electromagnetic waves ...they each have different meanings.
Electromagnetic waves are transferred by electromagnetic radiation.
the principle on which an electromagnetic crane works is electromagnetic induction
An electromagnetic wave.An electromagnetic wave.An electromagnetic wave.An electromagnetic wave.
That's called the electromagnetic spectrum.
It is electromagnetic radiation
the energy that makes the electromagnetic spectrum is electromagnetic radiation
The electromagnetic spectrum is the range of all possible frequencies of electromagnetic radiation.[1] The "electromagnetic spectrum" of an object is the characteristic distribution of electromagnetic radiation emitted or absorbed by that particular object.
electromagnetic pulse
an electromagnetic radition
There is no such thing as "electromagnetic gravity".
I would call it an electromagnetic wave, or electromagnetic energy.