Question

Canal rays are:
A) Alpha rays
B) Light emitted when an electron falls into the nucleus
C) Ionized gaseous atoms
D) Light emitted when an electron comes from a higher orbit to lower orbit.

Answer 1

Eugen Goldstein was the German scientist who discovered canal rays which is also known as anode rays. This experiment led to the discovery of protons. This discovery happened after the discovery of electrons. In this experiment, the scientist applied the high voltage across a discharge tube which was having a perforated cathode.

Complete answer:
Alpha rays/ alpha particles/ alpha radiation is the same. They consist of two protons and two neutrons bound together into a particle which is similar to helium. These are produced in the alpha decay.
Canal rays are positive rays or anode rays. Therefore, canal rays are ionized gaseous atoms. The canal rays are those particle beams that travel in the opposite direction to the cathode rays, which are electron waves that move through the anode. These positive rays are called channel rays, because the channels or holes in the cathode formed them.
In the canal rays experiment, the electrons are emitted from cathode with the gas atoms found in a tube. After the collisions the ions are left behind which are positively charged. The produced positive charge moves towards the cathode and the cathode rays travels from negatively charged cathode to positively charged anode.
Therefore, the canal rays ionized gaseous atoms.

So the correct option would be option C.

Note: The canal rays depend upon the natural gas present in the tube. This is because the canal rays/anode rays are the positive ionized ions by ionization of gas present in the tube. The particle of charge to the mass ratio was found to be different for the different gases. Some of the positively charged particles carry the fundamental value of charge. The behavior of particles in canal rays are opposite to the electrical and magnetical field.