Which one of the following statements is not correct?a)The cathode ray...
- Cathode Ray is a beam of electrons emitted from the cathode of a vacuum tube.
- Cathode rays themselves are invisible.
- Television picture tubes are the most common examples of the cathode-ray tubes.
- The characteristic of cathode rays does not depend upon the nature of the gas present in the cathode-ray tube
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Which one of the following statements is not correct?a)The cathode ray...
Explanation:
Origin of Cathode Rays
- Cathode rays are produced when a high voltage is applied across an evacuated glass tube containing a cathode and anode.
- The cathode rays originate from the cathode and proceed towards the anode in a cathode-ray discharge tube.
Television Picture Tubes
- The television picture tubes are cathode-ray tubes that use a beam of electrons to create an image on a fluorescent screen.
Visibility of Cathode Rays
- The cathode rays themselves are not visible as they are invisible, but their effects can be seen through fluorescence, ionization, and heating.
Characteristics of Cathode Rays
- The characteristics of cathode rays depend upon the nature of the gas present in the cathode-ray tube.
- For example, if the gas is nitrogen, the cathode rays will produce a blue glow, whereas if the gas is neon, the cathode rays will produce a red-orange glow.
Correct Statement
- Therefore, the correct statement is option 'D' which says that the characteristics of cathode rays depend upon the nature of the gas present in the cathode-ray tube.