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The earliest version of the CRT was known as the "Braun tube", invented by the German physicist Ferdinand Braun in 1897. [13] It was a cold-cathode diode, a modification of the Crookes tube with a phosphor-coated screen. Braun was the first to conceive the use of a CRT as a display device. [14] The Braun tube became the foundation of 20th ...
Diagram showing how a crystal detector works. A shows the amplitude modulated radio signal from the receiver's tuned circuit, which is applied as a voltage across the detector's contacts. The rapid oscillations are the radio frequency carrier wave. The audio signal (the sound) is contained in the slow variations of the size of the waves. If ...
A business using a part will often use a different part number than the various manufacturers of that part do. This is especially common for catalog hardware, because the same or similar part design (say, a screw with a certain standard thread, of a certain length) might be made by many corporations (as opposed to unique part designs, made by only one or a few).
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The rectification property of metal–semiconductor contacts was discovered by Ferdinand Braun in 1874 using mercury metal contacted with copper sulfide and iron sulfide semiconductors. [9] Sir Jagadish Chandra Bose applied for a US patent for a metal-semiconductor diode in 1901. This patent was awarded in 1904.
5 Egg Myths Dispelled By An Expert, Plus Tips For Every Egg Lover. But if the membrane is broken, it is not safe for humans to eat, said Steele. It is, however, still good for the compost bin.
India on Thursday hailed chess prodigy Gukesh Dommaraju after the 18-year-old became the youngest world champion with a thrilling final win over China's Ding Liren.