فكرة الموجب والسالب Charles-François Dufay #science #physics

Imagine that the world once thought there was only one type of electricity…

Then suddenly, one scientist said: No! There are two types!

This scientist's name was Charles-François Dufay. He was conducting experiments on static electricity… the kind of electricity that causes light paper to move.

Duvay tried rubbing a glass rod… and observed an effect. Then he tried rubbing resin/amber… and observed a “different” effect!

This is when he understood that there are two types of charge: a “glass” charge and a “resin” charge.

He also observed an amazing rule: like charges repel… and unlike charges attract. It's not magic… it's the law!

And from here began the concept of positive and negative charges that we use today in all devices!
#science #marginofsafety #hse #safety #العلم #physics #electronic #electrical #tech

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