Why Is the Ocean Blue?

We've all heard that the ocean is blue because it reflects the sky—but that popular answer is mostly wrong. Dive into the real science behind the ocean's color and discover why a glass of water looks perfectly clear while the ocean covers the planet in brilliant sapphire. In this video, you'll learn: • What actually happens to sunlight the moment it touches the sea • Why the ocean absorbs red light before anything else • Why a bucket of seawater looks colorless while a whole sea looks painted • Why some coastlines glow green or turquoise instead Subscribe to The Blue Why for more! #OceanScience #WhyIsTheOceanBlue #ScienceExplained #Oceanography #MarineScience #TheBlueWhy Chapters: 00:00 The Puzzle: A Glass vs. an Ocean 00:59 What Sunlight Is Made Of 01:30 Water Eats the Warm Colors First 02:36 Pure Water Is Intrinsically Blue 04:05 Scattering: The Second Mechanism 04:43 Why Shallow Water Looks Clear 05:47 Why Real Oceans Turn Green or Turquoise 07:36 The Sky's Real Role — Corrected 08:27 The Full Picture, Layer by Layer 09:07 Back to the Glass — and What's Next