{"id":63748,"date":"2026-05-24T05:25:31","date_gmt":"2026-05-23T20:25:31","guid":{"rendered":"https:\/\/phys-edu.net\/wp\/?p=63748"},"modified":"2026-05-24T05:25:31","modified_gmt":"2026-05-23T20:25:31","slug":"the-physics-classroom-hidden-in-a-pool-what-waves-teach-us-about-reflection-interference-and-huygens-principle","status":"publish","type":"post","link":"https:\/\/phys-edu.net\/wp\/?p=63748&lang=en","title":{"rendered":"The Physics Classroom Hidden in a Pool: What Waves Teach Us About Reflection, Interference, and Huygens’ Principle"},"content":{"rendered":"

I\u2019m science trainer Ken Kuwako. Every day is an experiment.<\/strong><\/span><\/p>\n

Take a look into a swimming pool, and you\u2019ll find something far more exciting than a simple splash. Hidden there is \u201cliving physics\u201d \u2014 the kind you don\u2019t usually see in textbooks. Reflection, diffraction, interference\u2026 these words may sound difficult, but all of these phenomena are quietly unfolding inside a single ripple spreading across the water.<\/p>\n

Over the past year, I\u2019ve been filming fascinating wave patterns in pools little by little, and I\u2019d love to share some of them with you today. There\u2019s a wonderful DVD called \u201cMathematical Curves Hidden in Everyday Life,\u201d and while watching pools, I realized that waves themselves are full of surprising beauty and patterns. Once you start noticing them, the surface of the water becomes an entire physics laboratory.<\/p>\n

What Happens When You Create Waves in a D-Shaped Pool?<\/h3>\n

First, here\u2019s a video showing what happens when a wooden ball is dropped into a D-shaped pool to create waves.<\/p>\n