It is a tube equipped with cathode and anode, with a mask with a slit so as to produce a planar cathode ray beam, there is also a fluorescent screen so as to highlight in a visual manner the presence of the beam. The picture below illustrates the operation of a Crookes tube in a schematic way.ДЇor experiments with cathode ray tube we used an educational model readily available on eBay. The term Crookes tube is also used for the first generation, cold cathode X-ray tubes, which evolved from the experimental Crookes tubes and were used until about 1920. Wilhelm RГ¶ntgen discovered X-rays using the Crookes tube in 1895. Crookes tubes are now used only for demonstrating cathode rays. ThomsonвЂ™s 1897 identification of cathode rays as negatively charged particles, which were later named electrons.

It was used by Crookes, Johann Hittorf, Julius PlГјcker, Eugen Goldstein, Heinrich Hertz, Philipp Lenard and others to discover the properties of cathode rays, culminating in J.J. When a high voltage is applied between the electrodes, cathode rays (electrons) are projected in straight lines from the cathode. A Crookes tube is an early experimental electrical discharge tube, with vacuum, invented by English physicist William Crookes and others around 1869-1875,В in which cathode rays, streams of electrons, were discovered.Дeveloped from the earlier Geissler tube, the Crookes tube consists of a partially evacuated glass bulb of various shapes, with two metal electrodes, the cathode and the anode, one at either end.

Anode cathode ray experiment