stroboscopic effect 即係電風扇看似停止不動, 如果可以避免這種錯覺?
- 天同Lv 78 年前最愛解答
Use filament bulb as the light source. This would eliminate stroboscopic effect.
The reason for this effect is relatively simple to understand. In the case of an ordinary incandescent filament bulb operating on a 50 Hz ac supply, the bulb delivers light during the entire period of the waveform. At the instants when the voltage is lower than the peak value, the bulb still delivers light but a slightly lesser quantity. Furthermore the thermal mass of the incandescent filament is such that it cannot heat up and cool down at the same rate as the current supply. Thus despite the ac power source, the lamp delivers a continuous light output, and such doesn't cause any stroboscopic effect.