Positively charged radiations
Explanation
Canal rays, also known as anode rays, were discovered by E. Goldstein in 1886. This discovery was pivotal in establishing the electrical neutrality of atoms by identifying the presence of positively charged constituents within the atom.
Analysis of Canal Rays:
- Nature of Rays: Canal rays are streams of positively charged radiations. They are produced in a discharge tube containing gas at low pressure when a high voltage is applied.
- Origin: These rays are formed when high-speed electrons (cathode rays) collide with gas atoms, ionizing them. The resulting positively charged gaseous ions accelerate toward the cathode and pass through its perforations (canals).
- Comparison with Cathode Rays: While cathode rays consist of electrons (negatively charged) and have a constant charge-to-mass ratio () regardless of the gas, canal rays consist of positive ions, and their properties depend on the nature of the gas used in the tube.
Key Takeaway:
Canal rays are streams of positively charged ions (anode rays) that travel in the direction opposite to cathode rays in a discharge tube.