write down the observation when discharge tube is connected to a high voltage source
Answers
Answer:
It was observed that when a high potential difference was applied b/w the electrodes, not only cathode rays were produced but also a new type of rays were produced simultaneously from anode moving towards cathode and passed through the holes or canals of the cathode. These rays were termed canal rays since these passed through the canals of the cathode.These were also named anode rays as these originated from anode.
When the properties of these rays were studied by Goldstein, he observed that these rays consisted of positively charged particles and named them as positive rays.
Explanation:
When a high voltage of about 10000 volts is applied to a discharge tube having a perforated cathode and containing air at very low pressure of about 0.001 mm of mercury, a faint red glow is observed behind the cathode.