Dimmer Switches: Secretly Strobe Lights

The video explains the evolution and functionality of dimmer switches, highlighting their transformation from energy-wasting resistors to efficient devices that manipulate alternating current. It discusses how modern dimmer switches work by turning lights on and off rapidly, a process imperceptible to humans due to the flicker fusion threshold. The video also touches on the historical development of dimmer switches by Joel Spira and their impact on energy efficiency.

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