Question

state the evidence other than cathode rays for the existence of electron

Answer 1

In the late 19th century, scientists were experimenting with vacuum tubes and electricity. These experiments showed such things like if you added a small amount of gas into a vacuum tube and ran an electric current through it it would glow. This is used today in fluorescent tubes and neon lights.
One of the experiments involved a tube with a heated wire at one end, an electrified screen in the middle, and a coating of phosphor at the far end. The discovery with this setup was that,under the right conditions, a dot would light up on the phosphor. This triggered a bunch of other experiments to figure out what was causing the dot.
They put objects in the tube, and showed that the objects cast shadows in the spot formed. Whatever it was, it acted like rays of something streaming from the cathode of the tube. So the tubes were called cathode ray tubes.
They put electric fields across the tube, and the spot was deflected in a way consistent with cathode rays being negatively charged. They put magnetic fields across the tube, and likewise got deflections consistent with negatively charged particles.
They varied the voltages driving the tube while doing these experiments, and were able to get results that told scientists the mass-charge ratio of the particles making up cathode rays.
With all the evidence they had from these experiments on cathode rays, they knew that they were made of tiny, negatively charged particles, with a calculatable mass-charge ratio, and a few other things as well. They called these particles ‘electrons’.

Answer 2

Answer:

There is no other evidence other than cathode rays for the existence of electron dear!

I Hope It Will Help!

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