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543

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[–] 21 pts

because they are diodes that emit light?

[–] 7 pts

A common misconception. Emitting diodes were actually first invented in the 1800s as a method for wireless signal transmission, but they could only emit in the radio range and were far too weak to produce useable signals beyond a few feet. The “light” term actually refers to the type of metal used in the diode’s construction — more specifically the lack of lead and mercury found in . Some more recent diode technologies have even allowed for the metal components to be supplanted completely, using organic materials like carbon and hydrogen.

[–] 3 pts

Absolutely. Brilliant reply!

[–] 2 pts

Duh! I have a friend that asks me questions like this.

[–] 2 pts

How do you find hats to fit that big brain head?