Category: Tech & Electricity

Browsing posts filed under "Tech & Electricity".

Why does a flickering fluorescent light blink faster when you wave near it?

The fluorescent light isn't actually blinking faster when you wave your hand—your movement just makes you notice the light's rapid, normally-hidden flicker by creating a strobe-like illusion.

May 18, 2025

Why do plastic water bottles sometimes hiss when squeezed and released?

That hiss from a squeezed plastic bottle is the sound of air rushing in or out due to pressure changes caused by squeezing (forcing air out) and the bottle springing back into shape (sucking air in).**

May 4, 2025