Make your own Flicker Wheel
All artificial lights flicker: fluorescent sources, discharge lamps and LEDs. Even tungsten lamps flicker slightly. The human eye cannot detect flicker over 20 times per second, 20 Hz. High quality drivers, ballasts and transformers reduces the visible flicker, as the rate is constantly maintained at 50-60 times per second, 50-60 Hz.
Because it's imperceptible, spinning the wheel under artificial light will reveal if there’s flicker.
15 - Feb - 2017
Category - Science and Technology