In 1897, Thomson set out to prove that the cathode rays produced from the cathode were actually a stream of negatively charged particles called electrons. (See Figure 1.8 in the textbook for Thomson's experimental setup). From Maxwell's theory, he knew that charged particles could be deflected in a magnetic field
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J.J Thomson's made a A cathode ray tube. This is a tube that is hollow and is sealed.
Thomson's cathode-ray tube experiments helped scientists discover the existence of negatively charged particles, or electrons, and their fundamental role in the structure of atoms. This laid the foundation for the development of the atomic model and contributed to the field of particle physics.
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Thomson set out to prove that the cathode rays produced from the cathode were actually a stream of negatively charged particles called electrons.
Particles in a tube or flask come from the surrounding air and materials that were introduced into the tube or flask. They can also be generated from the breakdown of chemicals or materials present in the container. Additionally, particles may be intentionally added for experimentation or analysis purposes.
Thomson had two pieces of evidence: 1- No matter what metal he used for the disk, the particles produced were indentical. 2- The particles had about 1/2000 the mass of a hydrogen, the lightest atom. These experiments provided the first evidence that atoms are made of even smaller particles.
Thomson's experiments with cathode rays proved the existence of negatively charged particles, which he called electrons. This discovery provided evidence for the existence of subatomic particles and laid the foundation for the development of the modern atomic theory.
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When air particles in a test tube are heated, they gain kinetic energy and move more rapidly. This increase in movement causes the particles to collide with each other and the walls of the test tube more frequently and with greater force, leading to an increase in pressure if the volume of the test tube remains constant. As a result, the temperature and pressure of the air inside the test tube rise.
sir jj thomsons was a brialiant english physics scientist, he observed the cathod in atom, later called electron, by CRT CATHOD RAY TUBE
The scientist who used a cathode ray tube to discover negatively charged subatomic particles was J.J. Thomson.