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.

Discuss the impact of different types of light bulbs on the perception of dimming.

What is the flicker fusion threshold and how does it relate to dimmer switches?