Question

How can you experimentally demonstrate that cathode rays are negatively charged particles?

Answer 1

• A beam of electrons emitted from the cathode of a high vacuum tube is known as cathode rays.
• To experimentally demonstrate the cathode rays are negatively charged, take an evacuated glass tube fitted with two electrodes.
• When we apply voltage we can observe that the glass opposite to the negative electrode glows from the electrons emitted from the cathode.
• It happened like this because there is a deflection of the cathode ray.
• Since the cathode rays are negatively charged, they will get deflected away from the negatively charged electrode and will move towards the positively charged electrode.