# symmetry-spectrum-path-diamond-wavelength-scan.mp4

Chapter section: Wave Propagation and Interference

Caption (verbatim):

No separate caption in the chapter.

Image description (verbatim):

Matching colors connect candidate paths to their contributions in the tip-to-tail sum as wavelength decreases

## Before the animation

Chapter lines 1220–1220:

In this limit, waves passing through slits behave as rays. A narrow beam through one opening reaches a small region of the screen, much as a thrown ball does.

Chapter lines 1222–1222:

Each path shares its color with its contribution to the tip-to-tail sum. As the wavelength shrinks, an increasingly narrow range of paths around the straight path carries the sum forward.

## After the animation