/* Wrapped headers reserve their own space when no height observer runs. */ body > header[data-site-header] { position: static; flex-shrink: 0; } body > main { padding-top: 48px; } html { scroll-padding-top: 24px; } .animate{ opacity:1; translate: var(--tw-translate-x) calc(var(--spacing) * 0); }

Access this content offline

/* Without scripts the menu button cannot open anything, so the links stay in view. */ [data-site-header] .site-menu-toggle { display: none !important; } [data-site-header] .site-navigation { display: flex !important; position: static !important; flex-direction: row !important; flex-wrap: wrap; flex-basis: 100%; border: 0 !important; box-shadow: none !important; padding: 0 0 8px !important; }

Skip to the reading

AP Unit 14: Waves, Sound, and Physical Optics

Find these readings by topic

This earlier reading list remains available with its complete tasks. The current book places these resources in the following topic chapters:

Waves and sound →
Connect disturbances and wave representations with propagation, boundary conditions, Doppler shifts, and interference.
Light as a wave →
Use electromagnetic-wave and phase models to explain polarization, diffraction, and interference patterns.

AP topic sequence for Waves, Sound, and Physical Optics.

Build the model, work through an example, explain it from memory, then apply it to the unit problems.

Help & feedback