UV Light

• What are the two types of light discussed in the video?

  Visible and ultraviolet light
• How does visible light appear different colors?

  It depends on the wavelength of light
• What is the order of colors in visible light?

  Red, orange, yellow, green, blue, indigo, violet
• What does the phrase "boy G bit" help to remember?

  The order of colors in visible light
• How is visible light used for communication?

  Through optical fibers transmitting light pulses
• Why do optical fibers transmit light effectively?

  Light reflects and bounces within the fiber
• What materials are needed for effective light transmission in optical fibers?

  Materials that totally reflect light
• What is the advantage of optical fibers over copper wires?

  They transmit more information with less distortion
• What comes after violet in the light spectrum?

  Ultraviolet radiation
• What is a common source of ultraviolet radiation?

  The Sun emits ultraviolet radiation
• What can ultraviolet radiation from the Sun cause?

  Suntans and sunburns
• How can we generate ultraviolet radiation artificially?

  Using sun beds for artificial tanning
• What is fluorescence?

  Absorption of UV light and emission of visible light
• Why do fluorescent paints appear bright?

  They emit light after absorbing UV light
• How do fluorescent lights work?

  They convert UV light into visible light
• What is the benefit of using fluorescent bulbs?

  They are energy efficient and reduce emissions
• How are security pens used with ultraviolet light?

  They mark property invisible until UV light shines
• What is a use of UV radiation in security?

  Marking property to prevent forgery
• How does UV radiation help in detecting forgeries?

  It makes invisible marks visible under UV light
• What is another use of UV radiation?

  Sterilizing water by destroying microorganisms
• What does UV radiation do to microorganisms?

  It destroys them
• What are the main uses of visible and ultraviolet light?

  • Visible light for seeing and communication
  • Ultraviolet light for tanning and sterilization
  • Fluorescence in paints and lights
  • Security applications with invisible markings