[Answer] cathode rays are _______

Answer: they are negatively charged particles

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cathode rays are _______ Cathode rays (electron beam or e-beam) are streams of electrons observed in discharge tubes. If an evacuated glass tube is equipped with two electrodes and a voltage is applied glass behind the positive electrode is observed to glow due to electrons emitted from the cathode (the electrode connected to the negative terminal of the voltage supply). They were first observed in 1869 by German physicis… Cathode rays (electron beam or e-beam) are streams of electrons observed in discharge tubes. If an evacuated glass tube is equipped with two electrodes and a voltage is applied glass behind the positive electrode is observed to glow due to electrons emitted from the cathode (the electrode connected to the negative terminal of the voltage supply). They were first observed in 1869 by German physicist Julius Plücker and Johann Wilhelm Hittorf and were named in 1876 by Eugen Goldstein Kathodenstrahlen or cathode rays. In 1897 British physicist J. J. Thomson showed that cathode rays were composed of a previously unknown negatively charged particle which was later named the electron. Cathode-ray tubes (CRTs) use a focused beam of electrons deflected by electric or magnetic fields to render an image on a screen. Cathode rays are so named because they are emitted by the negative electrode or cathode in a vacuum tube. To release electrons into the tube they first must be detached from the atoms of the cathode. In the early cold cathode vacuum tubes called Crookes tubes this was done by using a high electrical potential of thousands of volts between the anode and the cathode to ionize Cathode rays are so named because they are emitted by the negative electrode or cathode in a vacuum tube. To release electrons into the tube they first must be detached from the atoms of the cathode. In the early cold cathode vacuum tubes called Crookes tubes this was done by using a high electrical potential of thousands of volts between the anode and the cathode to ionize the residual gas atoms in the tube. The positive ions were accelerated by the electric field toward the cathode and when they collided with it they knocked electrons out of its surface; these were the cathode rays. Modern vacuum tubes use thermionic emission in which the cathode is made of a thin wire filament which is heated by a separate electric current passing through it. The increased random heat motion of the filament knocks electrons out of the surface of the filament into the evacuated space of the tube. Since the electrons have a negative charge they are repelled by the negative cathode and attracted to the positive anode. They travel in straight lines through the empty tube. The voltage applied between the electrodes accelerates these low mass particles to high velocities. Cathode rays are invisible but their presence was first detected in ea...

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