Electric field and Magnetic field are the same?

In your daily life, you have encountered many incidents where you have worked with electric field, with magnetic field and even both. If you rub a pen on your hair and bring it close to a paper, it would attract. That is electric field. If you bring a bar magnet to an iron piling, then you would see that iron piling will be stick on that magnet. This is magnetic filed. 

Electric field and Magnetic field are the same?

yes, but no. they are part of the same thing called "Electromagnetic field".

It is like two faces of the same coin. if head is electric field, then tail is magnetic field. when a coin is flipping in the air, we don't know whether it is head/tail. similarly, both the electric field and the magnetic field exist at the same time in the same place simultaneously as Electromagnetic waves. Light you are seeing is one of electromagnetic waves. Electromagnetic waves include radio waves, micro waves, infrared waves, visible light (red, orange, yellow, green, blue, indigo, and violet), ultraviolet, x-rays, gamma rays and cosmic rays. All of these waves have electric and magnetic field simultaneously. Now you may have a question in your mind, "If all of these waves have both electric and magnetic field simultaneously, then what separates those waves as ultraviolet, infrared and x-rays?". The answer to your question is "Frequency". Scientists have certain ranges of frequencies to define a electromagnetic wave as a gamma ray or x-ray or ultraviolet or etc... For example, if an electromagnetic wave has a frequency within the range of 300GHz - 400THz, then it is defined as infrared wave. If an electromagnetic wave has frequency within range of 400THz- 484THz, then it is defined as Red. Now you may have another confusion in your brain as "then how the hell, we see colors like pink, peacock blue etc..?". The answer lies in your brain's visual department. Our eyes and brain mix the primary colors together to make us feel these colors. Now you know that the light that comes from your device is a mix of both electric and magnetic fields. But, why is it so? To understand that, we need to first understand electric and magnetic fields separately.

Electric Field 

Wherever there is a static charge, there is an electric field. An electric field is created by a static charge. This electric field stretches till the infinity, but its strength decreases with the distance from the charge. If a another charge is present in the electric field of a charge, they either push or pull. They apply a force. For example, if you bring two same charges together, they repel. if you bring two opposite charges together, they attract. Static charges are everywhere in our world. That means, electric field is everywhere. 

Magnetic Field

Wherever a charge is moving (not static), there is a magnetic field. A magnetic field is created by a moving charge. This magnetic field forms closed loops that come from the north pole to the south pole. Like electric filed, the strength of magnetic field also decreases with the distance from the moving charge. Inside an atom, electrons are revolving around the nucleus. But the electrons are charged particles. So there is a magnetic field since charged particles are moving. If we look closer to the nucleus, protons are rotating itself. This is also magnetic field. 

Relativity is the game changer

Imagine yourself in a train which is near another train. Only one train is moving at the moment. by staying inside your train, how will you know which train is moving. Actually, both the trains are moving in relative to certain frames of reference. With relative to your train, your train is at rest, the other train is moving. With relative to a person in the other train, the other train is at rest, while your train is moving. 

That's the same case in moving charges. Relative to one charge, another charge, which may be at rest relative to it, is moving. As I said earlier, moving charges create magnetic field and static charges create electric field, if certain charge is rest in a certain frame, then that charge creates electric field, if that charge is moving relative to certain frame, that charge creates magnetic field. But the same charge is rest relative to certain frame and also moving relative to another frame. That means the same charge is creating electric field in one frame of reference and creating magnetic field in another frame of reference. If so, what is actually happening there?

Electromagnetic Field

Electric field and magnetic field are like two faces of the same thing called Electromagnetic field. Depending on the observer's frame of reference, they may see only the electric field face or magnetic field face or both simultaneously. They are not separate things; they are different aspects of one electromagnetic field.