Light Wave Reflection and Phase Shift Diagram | Physics Education #42642 (License: Personal Use)

This diagram illustrates the principle of phase change during light wave reflection: the upper blue wave shows a π-phase shift (inversion) upon reflecting from a higher-index medium, while the lower wave reflects without inversion from a lower-index interface. Arrows indicate incident and reflected ray directions, and the orange baseline represents the boundary plane. The contrast highlights critical behavior in thin-film interference and anti-reflective coating design.

Used in physics education resources, optics textbooks, and online tutorials explaining wave reflection, Fresnel equations, and interference phenomena; targets learners seeking intuitive understanding of phase shifts in electromagnetic waves.