Timeless and collectible, The Feynman Lectures on Physics are essential reading, not just for students of Physics, but for anyone seeking an insightful introduction to the field from the inimitable Richard P. Feynman. "When I look at The Feynman Lectures on Physics, I feel a very personal sense of closeness to them", said Feynman, looking back at the origins of these books. Ranging from Gauss's law and Maxwell's electrodynamics to waveguides, dielectrics, magnetic materials and elasticity, the lectures collected in Volume II of The Feynman Lectures on Physics stand as a monument to clear exposition and deep insightand to Feynman's deep connection with the field.