A

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Q. The electrical domestic tube light gives white fluorescent light because of

  • (A) Colision between molecules of filled gas under electric current
  • (B) Heavy current
  • (C) Vacuum inside the tube
  • (D) Falling of ultra violet rays on the white inner coating of the tube
  • Correct Answer - Option(D)
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Explanation by: Admin
The electrical domestic tube light gives white fluorescent light because of falling of ultra violet rays on the white inner coating of the tube. The ultraviolet rays have high frequency and shorter wavelength are converted to visible white light with lower frequency and greater wave length.

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