Guess the name of musician
[3494] Guess the name of musician - Look carefully caricature and guess the name of musician. - #brainteasers #music - Correct Answers: 50 - The first user who solved this task is On On Lunarbasil
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Guess the name of musician

Look carefully caricature and guess the name of musician.
Correct answers: 50
The first user who solved this task is On On Lunarbasil.
#brainteasers #music
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Grandma Said That?

Grandma Said That?
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Phototransistor

In 1950, the invention of the phototransistor was announced. This was a transistor operated by light rather than electric current, invented by Dr. John Northrup Shive of the Bell Telephone Laboratories at Murray Hill, N.J. It used a tiny chip of germanium, a semiconductor material, but only a single collector wire. The tip of this wire rests in a small dimple ground into one side of the germanium disk. At this point the germanium disk is only three thousandths of an inch thick. Light focussed on the opposite, un-dimpled side of the disk can control the flow of current in the wire, thus making a control device similar in function to a photo-electric cell.
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