Physics Asked by user7393973 on April 20, 2021
Quite often, after sitting in front of the computer not moving a whole lot for a long time my upper body clothes (usually sweaters) make soft crackling sounds when moving or specially when taking them off. It affects more a certain type of thick materials (wool I think) than thin clothes.
Why does that happen, does it has to do with electricity, radiation, temperature, waves, a mix or something else?
It does tactually feel a little like static electricity from rubbing a balloon in
clothes, and the computer does emit some warmth temperature.
Does it has to do more with the computer’s monitor, or maybe some type of radiation? As I notice it more with an older laptop at work than my modern desktop at home.
Without making the question too opinion based, is it something slightly concerning/unhealthy that should be reduced in some way (maybe a screen filter/pellicle) other than the obvious solution of being less time in front of the computer with more regular breaks and maybe moving more?
I am no expert in how computers exactly work, but I have read that computers release some radiation. It is nothing to worry about, it won't do any harm, but I think that may be causing some static charge in your clothes, especially since you sit in front of the computer for long times. That is why they make the sounds.
Answered by PNS on April 20, 2021
A computer screen can build up a static charge after a period of use. If you are close to the screen, the charge on the screen can polarize your sweater a bit, producing a small surface charge on the sweater. If you lean back, the depolarization might be causing the crackling.
Answered by Jerrold Franklin on April 20, 2021
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