
Given below are two statements :
Statement I: A time varying electric field is a source of changing magnetic field and vice-versa. Thus a disturbance in electric or magnetic field creates EM waves.
Statement II: In a material medium, the EM wave travels with speed .
In the light of the above statements, choose the correct answer from the options given below.


Important Questions on Electromagnetic Waves


The intensity of the light from a bulb incident on a surface is . The amplitude of the magnetic field in this light-wave is _____
(Given : Permittivity of vacuum , speed of light in vacuum )

(Permittivity of free space, ) _______




A beam of light travelling along -axis is described by the electric field . The ratio of electric force to magnetic force on a charge moving along -axis with a speed of will be :
[Given speed of light ]
