The idea of waves -- Sinusiodal waves--their strength and power -- Media and modes -- Phase velocity and group velocity -- Vector and complex representation -- Coupled modes -- Coupled modes--the other solution -- Spatial harmonics and coupling -- Coupling and tapered media -- Waves and forces -- Energy and momentum of waves in a moving medium -- Energy and angular momentum in rotating media -- Parametric amplifiers -- Polarization -- Plane and nearly plane waves -- Antennas and diffraction -- The scalar wave equation -- Radiation -- Retrospect and prospect