{"id":63077,"date":"2026-05-05T05:35:25","date_gmt":"2026-05-04T20:35:25","guid":{"rendered":"https:\/\/phys-edu.net\/wp\/?p=63077"},"modified":"2026-05-05T05:35:25","modified_gmt":"2026-05-04T20:35:25","slug":"the-48-magic-diving-into-the-other-world-through-a-penguins-eyes","status":"publish","type":"post","link":"https:\/\/phys-edu.net\/wp\/?p=63077&lang=en","title":{"rendered":"The 48\u00b0 Magic: Diving into the “Other World” Through a Penguin\u2019s Eyes."},"content":{"rendered":"

This is Kuwako Ken, your science trainer. Every day is an experiment.<\/strong><\/span><\/p>\n

Have you ever looked up at the sky from beneath a tank of water and felt like it was cut into a perfect circle? I had that exact experience at the penguin tank in the Sumida Aquarium. From the blue-tinted bottom of the tank, a round \u201cwindow\u201d seemed to float above, revealing the outside world beyond it. Why does this happen? The answer lies in a beautiful trick of nature explained by high school physics: refraction and total internal reflection of light.<\/p>\n

A Strange View at Sumida Aquarium<\/h3>\n

The other day, I visited Sumida Aquarium<\/a>. One of its highlights is the large indoor penguin tank. When you look down into it from the second floor, the deep blue of the bottom stands out clearly. <\/p>\n

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From the second floor, you can clearly see the blue bottom of the tank<\/p>\n

Then, when you go down to the first floor, you can look up at the tank from below. What you see at that moment is captured in the video below.<\/p>\n