Silence Is Physically Impossible - Leonard Susskind скачать в хорошем качестве

Silence Is Physically Impossible - Leonard Susskind

Silence does not exist. Not in a quiet room. Not in the vacuum of space. Not anywhere in the observable universe. What you call silence is not the absence of sound, but sound your brain has filtered out. Air molecules are constantly colliding. Buildings vibrate. Your heart beats. Even in the quietest anechoic chamber, people begin to hear their own body — and eventually their own nervous system generating sound. Physics goes further. As long as temperature is above absolute zero, matter vibrates. And even at absolute zero, quantum fluctuations remain. The vacuum itself is not silent. Silence is not a physical state. It is a decision made by your brain about what to ignore. The universe has never been quiet.