Give three reasons to support the evidence that cathode rays are negatively charged electrons?

Ans: There are the following reasons:

Further:

Here are three reasons to support the evidence that cathode rays are negatively charged electrons:

The direction of cathode ray deflection in a cathode ray tube (CRT) can be explained by the Lorentz force law, which states that charged particles experience a force when moving through a magnetic field. This force is directed perpendicular to the direction of the particle's motion and the direction of the magnetic field and is proportional to the particle's charge and velocity. When cathode rays are deflected in a CRT, the direction of deflection is consistent with the Lorentz force law if the cathode rays are negatively charged particles.
Cathode rays can be deflected by an electric field, which is another characteristic of charged particles. When cathode rays are passed through a region of space where an electric field is present, they are deflected in a way that is consistent with their negative charge.
Cathode rays can be used to produce fluorescence, which is the emission of light by a material when it is struck by high-energy particles. This phenomenon occurs because the energy of the cathode rays causes the electrons in the material to become excited and release their excess energy as light. The ability of cathode rays to produce fluorescence is consistent with the idea that they are high-energy, negatively charged particles.

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