Thanks to Skillshare for supporting this video: skl.sh/MinutePhysics for 2 free months!
This video is about a multistable perceptual illusion, similar to the hollow face illusion, whereby maps or aerial or satellite photos look upside down/inside out, ie, concave (valley) parts look convex and convex (mountainous) parts look concave. Just flip the images around and things will make a lot more sense! Its just because our eyes gauge depth based on the location of shadows, and the sun always casts shadows on the bottoms of things.
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Это видео о том, почему слова переворачиваются в зеркале влево и вправо (горизонтально), но не вверх и вниз (вертикально). Ответ связан с зеркальным отражением, как будто зеркала это окна в другой мир (как альтернативные вселенные, вывернутые наизнанку!), и непрозрачностью того, на чем мы пишем.
How is the chemical energy of gasoline transformed into kinetic energy of a moving car? And where does that kinetic energy go when the car crashes into something and stops moving?
Thanks to Ford (http://www.takeagoodlook.com) for sponsoring this video.
If you’re not a morning person, then you’d probably love living on the moon or out in space! The whole “lack of oxygen” thing aside, a ‘round-the-clock night sky sounds pretty tempting! But why is there so much light on Earth, but almost none once you leave our planet?
You might think that it’s light during the day and dark at night because the Earth spins on its axis, and the Sun illuminates either hemisphere. That’s part of the reason, but it’s more complicated than that. Our star shines on the Moon too, but the sky above it is always black!