1- Aspectos no comprendidos en la lectura inicial
Atracción de ámbar: Resina fósil de color amarillo, muy ligera, dura y quebradiza, que se electriza por frotamiento y arde con facilidad, desprendiendo un olor agradable.
De magnete: es un trabajo científico realizado en 1600 por el médico, físico y científico inglés WilliamGilbert.
En este trabajo Gilbert describe varias de sus experiencias con su modelo de la Tierra denominado terrella. A partir de los experimentos llegó a la conclusión de que la Tierra era magnética y que este era el motivo por el cual las brújulas apuntaban al norte.
Instrumento que se usa para detectar y medir la corrienteeléctrica. Se trata de un transductor analógico electromecánico que produce una deformación de rotación en una aguja o puntero en respuesta a la corriente eléctrica que fluye a través de su bobina. Este término se ha ampliado para incluir los usos del mismo dispositivo en equipos de grabación, posicionamiento y servomecanismos.
History of ElectromagnetismChapter I: Ancient History
Now man has known about magnetism and electric forces since antiquity, but before the last four centuries of the second millennium, man regarded them as a kind of natural mysticism.
Chapter II: The Seventeenth Century
Now in the middle of the seventeenth century did scientists play with light in many ways. To determine"how light acted," scientists performed experiments. And through such experiments, interference and diffraction were observed. Thus in the year 1665 did Robert Hooke propose that light was made of waves, for waves can interfere and can diffract.
And it came to pass that, in the year 1676, the eye of an astronomer peered at Io through atelescope. And he saw Io orbiting around the planet Jupiter as it had always done. And with a watch in his left palm and a pen in his right hand, the astronomer wrote down the times at which Io disappeared behind the planet Jupiter . And for many months did he do this. Now when Jupiter moved away from Earth, the orbital times were longer by atiny bit. And when Jupiter moved toward the Earth, the orbital times were shorter by a tiny bit. And the astronomer went into deep contemplation. And from deep thought emerged a revelation – the answer to the puzzle was an "optical illusion" – not a mystical but a physical optical illusion. And the astronomer concluded that the speed of lightwas finite, for if its speed were finite and if Jupiter were moving away from Earth, then extra time would be needed for light to reach the Earth from successive disappearances of Io. And if the speed of light were finite and if Jupiter were moving toward the Earth, then less time would be needed for the light to reach the Earth fromsuccessive disappearances of Io. And from solar system information, the speed of light was crudely measured. And for the first time was it realized that light did not go instantly from here to there. And so by observing Io and Jupiter at night, man bécame enlightened about the speed of light.
Chapter III: The Eighteenth Century
Now at the beginningof the eighteenth century did Newton, the mighty scientific prophet, propose that light might be made of particles. But others disagreed. And a battle between those who thought that light be particles and those who thought that light be waves. This battle over light would last two hundred years.
Now in the year 1729, electricity was shown to...