clocks

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So... the minute hand shows progression — apparently we think of time in wildly different ways

So... the minute hand shows progression — apparently we think of time in wildly different ways

706K views • 4 years ago

Technology Connextras

A Technology Connections video essay on how analog and digital clocks shape different mental models of time, with the minute hand acting as a progress indicator.

Why No One Has Measured The Speed Of Light

Why No One Has Measured The Speed Of Light

24.3M views • 6 years ago

Veritasium explains why the one-way speed of light has never been measured, only the round-trip speed, since measuring it requires synchronized clocks that assume the answer. It explores the implications for relativity.