What Are Electromagnetic Waves?

When the wave theory of light first gained general acceptance it was considered that light waves were conveyed through a transparent elastic medium which filled the whole of space even a vacuum. This substance was called ether.

A further step forward was made in 1845 when Michael Faraday showed that, under certain conditions, light waves passing through a material medium were affected by a magnetic field. Now by that time, it was now known that there was an inseparable connection between magnetism and electricity. Faraday's experiment was the first major step towards the establishing relationship between the light and magnetism.

Some years later, the eminent mathematician and physicist James Clark Maxwell, became very interested in Faraday's work on electricity and eventually put forward a mathematical theory suggesting that on oscillating, electric current should be capable of radiating energy in the form of electromagnetic waves. An electromagnetic wave can visualized as an oscillating electric force travelling through space accompanied by a similar magnetic force in plane at right angles to it. More importantly, Maxwell's equation led to the conclusion that such waves if they excited would travel with the same velocity as light. Electromagnetic waves behave like electric light but with greater wavelength.

Electromagnetic waves are those waves which contain both electrical and magnetic field components in it. The example can be taken as stone thrown in the water has two components; downward line of action of stone as electrical and waves on the surface of water as magnetic component.

I believe you are both a little bit right and wrong.  Look up the subject in a physics text.   You should find that electric current and light are not one in the same.  Electric current or waves are one of the two components of "Light".  Another more descriptive, broader term for light is "Electromagnetic Radiation".  This is more accurate because this more complete description of light includes the info that it is composed of radiation that is propagated in the form of sine waves traveling perpendicular to each other in all directions from its source.  These waves carry/transmit energy that can vary with the waves' frequency, ranging from very high energy/frequency gamma rays (invisible to the human eye) to UV, visible light, IR, microwaves, and even radio waves, which are very low energy and long wavelength (many feet).  LASERS are electromagnetic devices that work within this framework, and some of whose physical properties and characteristics are so unique and uncommon that they are often used to identify and describe this phenomenon.

Adnanmam,I was impressed with your answer! However Faraday and Maxwell are my heroes, and I, just like you I have studied both these men a great deal.

And I believe it was around 1832 when Faraday doing his now famous test where he was using mercury in which he uncovered flux was going around all electric current.

And I believe it was in 1852 when Faraday said Electric Current and Light were one in the same, and moved at the same speed!

Then it was 1854 when Maxwell proved that he was right.
In the later years the mercury exposure was getting to Faraday.