Science, Technology
WHY DO WE THINK WHAT WE DO ?

RUTHERFORD  Ernest Rut.. Science, Technology -

RUTHERFORD Ernest Rutherford was born on August 30, 1871, in Nelson, New Zealand, the fourth child and second son in a family of seven sons and five daughters. His father James Rutherford, a Scottish wheelwright, emigrated to New Zealand with Ernest's grandfather and the whole family in 1842. His mother, née Martha Thompson, was an English schoolteacher, who, with her widowed mother, also went to live there in 1855.
dalton John Dalton (Se.. Science, Technology -

dalton John Dalton (September 6, 1766 – July 27, 1844) was an English chemist and physicist, born at Eaglesfield, near Cockermouth in Cumbria. He is best known for his advocacy of the atomic theory and his research into colour blindness (sometimes referred to as Daltonism, in his honour).

Around 1790 Dalton seems to have considered taking up law or medicine, but his projects were not met with encouragement from his relatives, and he remained at Kendal until, in the spring of 1793, moving to Manchester. Mainly through John Gough, a blind philosopher to whom he owed much of his scientific knowledge, Dalton was appointed teacher of mathematics and natural philosophy at the Manchester Academy. He remained in that position until the college's relocation to York in 1803, when he became a public and private teacher of mathematics and chemistry.

JJ THOMPSON    In 1897.. Science, Technology -

JJ THOMPSON In 1897, J.J. Thompson ,along with a group of his graduate students, set out to investigate this particle. He designed some tubes containing electrodes inside with the air evacuated from the tubes. These were called "Crookes Tubes" named after the original designer. They would later be called "Cathode Ray Tubes". Experiments were performed on these tubes in which high voltage electrical current was passed between the two electrodes. Ray like emanations proceeded from the Cathode electrode to the Anode electrode. Since these emanantions originated from the Cathode electrode they would be called "Cathode Rays". J.J. Thompson designed some special tubes that investigated the properties of these "Cathode Rays". He designed a tube that allowed a beam of these Cathode Rays to impact against the surface of a Zinc Sulfide coated screen. As the rays impacted on the surface, it emitted a spark of light so that the invisible ray's path could be observed. He then proceeded to bring an electrical field consisting of a positive plate and a negative plate near the vacinity of the Rays. When the electrical current of the electrical field was turned on, the path of the "rays" was deflected away from the negative plate and toward the positive plate. This was a clear indication that the so called rays possessed a negative charge. Another Crookes tube design had an object, a Maltese Cross, placed just past the exit path of the cathode rays as they went from the cathode to the anode.




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