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Michael Faraday (4)

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EN_00945656_0059
Undated photograph of English chemist and physicist Michael Faraday (1791 - 1867). (AP Photo)
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EN_00945656_1585
Undated picture of English chemist and physicist Michael Faraday. (AP Photo)
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Illustration from an 1892 Chemistry book for Faraday's experiment for investigating the different parts of a candle flame. An ignited candle in holder is next to a glass flask, a glass tube extends from the flame of the candle through the neck and into the globe of the flask. The Chemical History of a Candle was the title of a series of six Christmas lectures for young people (1860) on the chemistry and physics of flames given by Michael Faraday at the Royal Institution where he gave an in-depth analysis of the evolutionary development, workings and science of candles. His account has served as the basis for lessons in taking observations in science ever since.
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Electrostatic field lines around two point charges and a cylinder. The left point is charged to -30,000 volts while the right point has a potential of +30,000 volts. Of special importance is the lack of fields showing inside the cylinder, which acts as a Faraday cage, shielding the enclosed area from any external electrical fields. This is the classic case of no electrical fields inside an electrical conductor. Part of a series showing different charging conditions. The electric fields are shown by placing the two charged objects in a pan filled with cooking oil and pepper flakes, which align in the electric field, allowing visualization of the field.
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