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With reference to tube-lights, consider the following statements :
1. It works on the principle of fluorescence to produce visible light.
2. White lime coating is done inside the tube to produce white light.
Q. Which of the statements given above is/are correct ?
  • a)
    1 only
  • b)
    2 only
  • c)
    Both 1 and 2 ​
  • d)
    Neither 1 nor 2
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
With reference to tube-lights, consider the following statements :1. I...
Phosphorous coating is done inside the tube to produce white light. To produce light in the visible range, the inside of the tube is coated with a phosphor powder. When the ultraviolet light (generated by electrons from mercury atoms) strikes the powder, it produces excitation of the electrons of the phosphor which then produce visible light by a process called fluorescence. The central element in a tubelight is a sealed glass tube. The tube contains a small bit of mercury and an inert gas, typically argon, kept under very low pressure. The tube also contains a phosphor powder, coated along the inside of the glass.
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With reference to tube-lights, consider the following statements :1. It works on the principle of fluorescence to produce visible light.2. White lime coating is done inside the tube to produce white light.Q. Which of the statements given above is/are correct ?a)1 onlyb)2 onlyc)Both 1 and 2 ​d)Neither 1 nor 2Correct answer is option 'A'. Can you explain this answer?
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