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When careful experiments were carried out using perforated cathode in the discharge tube, a new type of rays known as anode rays were revealed. These rays after emitted by anode pass through the pores made in the cathode surface. These rays carry a positive charge ...

The mass of an electron moving at a velocity much smaller than the velocity of light is known as rest mass. It is calculated by the relation:- M=e/ (e/m) =9.1091X10-31 where e is the charge on an electron e/m is the ratio calculated by Millikan. When the electron ...

Continue Comments Off on What Is Rest Mass And How It Differs From The Mass Of An Electron Moving At Higher Velocities?

Millikan used his famous oil drop technique to determine the charge on an electron. In this experiment, an air containing chamber is injected with an oil spray consisting of microscopic droplets produced by an atomizer. The air is exposed to X-rays and ionized. This ionization ...

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A Few years back, we didn’t know the structure of atom; in fact John Dalton considered it to be as hardand dense and as the smallest and indivisible part of matter. But that fact didn’t remain true for long and a new concept in the ...

Continue Comments Off on What Are Electrons And What Is J.J Thompson’s Contribution Towards Its Discovery?
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