Give two characteristics of electromagnetic waves..Write expression for velocity of these waves in terms of electric permitivity and magnetic permeability..

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Two characteristics of EM waves are:

  1. EM waves are propagated by oscillating electric field and magnetic field at right angles to each other.
  2. EM waves are transverse waves and do not need a medium to propagate.


The expression of velocity of EM waves in terms of electric primitivity and magnetic permeability is,

µ0 is the magnetic permeability of free space.

ε0 is the electric permeability of free space

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1.mag n elec field are perpend to each othr n to direcn of propagatn

2.they dnt need medium to travel


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