Light Is Waves: Crash Course Physics #39
Why the open web links it
Explains the wave nature of light and how it helps make sense of its behavior.
Linked by 13 independent sites, 3 of them widely read in the 2026-10 crawl of the open web, including nasa.gov, libretexts.org, raindrop.page, miragenews.com, alcowep.com.