Russell Ohl discovers the p-n junction and photovoltaic effects in silicon that lead to the development of junction transistors and solar cells.
In the mid-1930s Russell Ohl, an electrochemist at Bell Telephone Labs in Holmdel, NJ, began investigating the use of silicon rectifiers as radar detectors. He found that increasing the silicon purity helped improve their detection ability. On 23 February 1940, he tested a small silicon slab that yielded strange, surprising results. When exposed to bright light, the current flowing through the slab jumped appreciably. He also noticed that different parts of the crystal yielded opposite electrical effects when tested with a "cat's whisker" style probe. Ohl and colleague Jack Scaff found that a seam in the slab marked the separation of the silicon into regions containing distinct kinds of impurities. One impurity, the element phosphorus, yielded a slight excess of electrons in the sample while the other, boron, led to a slight deficiency (later recognized as "holes"). They called the regions n-type (for negative) and p-type (positive); the surface or "barrier" where these regions met became known as a "p-n junction." Light striking this junction stimulated electrons to flow from the n-side to the p-side, resulting in an electric current. Ohl had discovered the photovoltaic effect that powers today's solar cells (1954 Milestone). William Shockley's conception of the junction transistor in 1948 (1948 Milestone) derived from Ohl's serendipitous 1940 discovery. The p-n junction became the most common form of rectifier used in the electronics industry and has since become a fundamental building block in the design of semiconductor devices.
Basically the same as in any computer, as well as the same as in any electronic device.
tv lol
No, it does not mean that a computer is mechanical. A computer is an electronic device that can process and store data. While computers have advanced capabilities, they still have limitations in terms of processing speed, memory capacity, and other hardware specifications.
Well, it depends what your definition of computers are. During World War 2, radar and other resources like that were used. But The "PC" we know today- Originated around the 60's-70's, and the technology really took off in the late 90's due to Bill Gates, Netscape, and all of the internet pioneers who worked countless hours improving the PC and the internet especcially.
pretty much like any other electronic device.
Improvised Electronic Device was created on 2010-06-22.
computers
Computers (or any other technological device from the stone spearhead on) are NOT discovered!
A computer is defined as: A device that computes, especially a programmable electronic machine that performs high-speed mathematical or logical operations or that assembles, stores, correlates, or otherwise processes information. So, technically yes, they are both computers.
electronic device that can process instructions and data open the third & fourth link of this website: computers-internet.co.cchope you get answer; good luck !
vacuum tubes
modem
Basically the same as in any computer, as well as the same as in any electronic device.
Advantages of media convergence include the ability to reach a wider audience, increased interactivity for consumers, and cost efficiencies for content creators. However, disadvantages can include the potential for a loss of diversity in content, challenges in regulating content across different platforms, and issues with privacy and data security.
Anything that uses the most recent technological information. A screw driver at one time was a technological device.
A computer is an electronic device that is used in a variety of ways. Society values computers for many reasons.
Computers are built the same way any other electronic device is built, at the time it was built. As the methods of building electronic devices changed over time, the methods of building computers changed too.