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A fallen tree in a forest "If a tree falls in a forest and no one is around to hear it, does it make a sound?" is a philosophical thought experiment that raises questions regarding observation and perception.
Does a tree make a sound when no one is around to hear it? Explore the tension between perception and reality, and how consciousness may be more fundamental than matter. Learn from philosophers like Berkeley and Planck, and join the free email course on life's big questions.
15 Μαΐ 2020 · If a tree falls in a forest and no one is around to hear it, does it make a sound? Of course it does, assuming that there is no freak occurrence like the wind blowing in just the right direction for it to silently fall down.
14 Φεβ 2011 · How does quantum theory challenge our understanding of sound, reality and causality? Learn how physicists have tested and verified the spooky predictions of quantum theory using Bell's inequality and Leggett's inequality.
13 Απρ 2016 · Learn how physics defines sound as a mechanical wave and not an auditory perception, and how this affects the famous riddle of the falling tree. Explore the difference between mechanical and electromagnetic waves, and the implications for sound in space and in a vacuum.
If a tree falls, sure it will create vibrations in the air that (if an ear is around to hear) will be perceived as sound, but some speculate that sound requires a receiver (such as an ear or microphone) in order to be called such.
The metaphysical interpretation of quantum physics says the tree not only exists, but it exists in every possible state – both fallen and not fallen – simultaneously, and it is only when you observe the tree that it falls – or doesn’t, depending on your observation.
