Question

velocity of electromagnetic wave in medium is​

Answer 1

Explanation:

The velocity of an electromagnetic wave in a medium is given by

v = c/n(λfree)

Where,

v = speed/ velocity of electromagnetic waves

n = is the index of refraction of the medium

λfree = wavelength of waves

c = speed of light c = 3*108 m/s

However, when there is difference of mediums with different refractive indices, then the value of velocity and wavelength changes but the frequency remains the same

Answer 2

The velocity of an electromagnetic wave in the medium is dependent on the magnetic and electric properties of the medium.

• Electromagnetic waves are different from mechanical waves, as a propagating medium is not required.
• Thus, electromagnetic waves are capable to travel through solids, vaccum, as well as through the air.
• An electromagnetic wave transfers its energy at a speed of 3 × 10`8 m/s through a vacuum. The transmission of an electromagnetic wave through a material medium takes place at a net velocity which is less than 3 × 10`8 m/s