Sir/mam I want to ask u that how exactly do electromagnetic waves travel in Vacuum. I know that changing electric and magnetic fields with time give rise to Each other,but please explain me how actually without any medium they travel. Bcoz if no material medium is present then how disturbances are carried in vacuum please clear this to me.

Asked by upmaniousagarika | 27th Jul, 2016, 01:44: PM

Expert Answer:

Electromagnetic waves can travel through vacuum or in other words they can travel without any medium is due to the presence of FIELDS. The electric and magnetic fields together constitute the electromagnetic field. It is this field itself on which the electromagnetic waves travel. 
We can also state this concept in other words as the electric and magnetic fields are inter produced by each other. The electric field produces a magnetic field, and so no medium was required. Similarly, a magnetic field produces an electric field without any requirement of medium.
So, to conclude the answer is that waves travel in vacuum through "FIELDS".
 
NOTE: The concept of fields is a complex subject which is covered only during post graduation period.

Answered by Romal Bhansali | 28th Jul, 2016, 02:55: PM

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