PH 106 Chapter Notes - Chapter 33: Poynting Vector, James Clerk Maxwell, Transverse Wave
7 Apr 2016
School
Department
Course
Professor
Document Summary
James clerk maxwell- a beam of light is a traveling wave of electric & magnetic fields: electromagnetic wave. Maxwell"s rainbow- wide spectrum of electromagnetic waves o. All em waves travel through free space w/ the same speed c. The electric & magnetic fields e and b are always perpendicular to the direction in which the wave is traveling: the wave is a transverse wave. The electric field is always perpendicular to the magnetic field. The cross product e x b always gives the direction in which the wave travels. The fields always vary sinusoidally: vary with the same frequency and in phase w/ each other. In which em bm are the amplitudes of the fields; w and k are the angular frequency and angular wave number c (wave speed) = 1 , = 3 x 108 sqrt(u0e0) Electromagnetic waves don"t require a medium (can travel through space)
