This is a device used for studying conduction of electricity through gases. The device consists of a long tube with metal electrodes sealed to each end of the tube.
The pressure of gas with the tube can be altered with the vacuumA vacuum is an area of space containing little or no matter (solids, liquids, and gases). It is a space with nothing in it, not even air. More pump connected to the tube.
The potential difference between the electrodes must be high, say about 1000v and the pressure inside a cathodeA cathode is the electrode from which a conventional current leaves the electrolyte. It is the negative part of the cell where reduction takes place. More ray tube is reduced to very low pressure ( say -0.01 mm Hg), the gas in the tube breaks into ions i.e they are ionised.
The positive ions move to the cathode while the negative ions and free electrons move to the anodeAn anode is an electrode of a polarized electrical device through which conventional current enters the device. It is the positive part of electrolytes where oxidation takes place. More. The positive ions knock off electrons from the metal of the cathode and those electrons stream towards the anode as cathode rays.
Note: These electrons produced at the cathode are called cathode rays.
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