In a material medium velocity of e.m. wave is..........

What is the velocity of e.m. waves in free space?

State essential properties of e.m. waves.

State the characteristics of e.m. waves.

Show that the ratio of electric and magnetic field is equal to velocity of light(i.e. e.m. wave)

Electromagnetic waves of frequency 5 xx 10^(14) Hz are passed through a liquid.The wavelength of the waves in liquid is measured to be 4.5 xx 10^(-7) m . Calculate velocity of e.m. waves in the liquid and

What does an e.m. wave consist of?