CROOKES DARK SPACE Meaning and
Definition
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The "Crookes dark space" refers to a specific region within a cathode ray tube, a vacuum tube used to generate and control electron beams. It is named after the English physicist Sir William Crookes, who extensively studied cathode rays in the late 19th century.
Within the cathode ray tube, the Crookes dark space refers to the area immediately adjacent to the cathode where the gas pressure is relatively low. Due to this reduced pressure, the energetic electrons emitted by the cathode can travel a short distance before colliding with gas molecules, resulting in a decrease in their energy. This results in a localized dark region in the tube, hence the name "dark space".
In the Crookes dark space, the electrons are accelerated towards the anode, creating a discharge glow between the two electrodes. This region can be observed as a slightly luminescent area inside the cathode ray tube when it is in operation. The width and intensity of the Crookes dark space vary depending on factors such as the pressure and composition of the gas inside the tube, as well as the strength of the electric field applied.
Understanding the behavior and characteristics of the Crookes dark space is crucial in the study and design of cathode ray tubes, as it helps to optimize their operation and efficiency. This term is primarily used within the field of plasma physics and vacuum technology.
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