Visible Light & Colour

• What are the colors in the visible light spectrum?

  Red, orange, yellow, green, blue, indigo, violet
• What does the acronym ROY G BIV represent?

  It represents the colors of the visible spectrum
• Why aren't white and black considered colors in the spectrum?

  White is a combination of all wavelengths
• What determines the color an object appears to be?

  The wavelengths of light hitting it and its properties
• How do opaque objects determine their color?

  By reflecting certain wavelengths of light
• Why does a gas appear blue?

  It reflects blue wavelengths and absorbs others
• How can cheese appear yellow?

  By reflecting yellow or a mix of red and green
• What is the difference between transparent and translucent objects?

  Transparent objects transmit most light; translucent transmit some
• How does a transparent object like glass behave with light?

  It transmits nearly all light with little absorption
• What determines the color of a translucent object?

  The wavelengths of light that are transmitted most
• Why does a green bottle appear green?

  It transmits green wavelengths and absorbs others
• What is the function of color filters?

  To filter out particular colors of light
• What happens when white light passes through a green filter?

  Only green wavelengths pass through
• What would a blue object look like through a green filter?

  It would appear black due to blocked light
• What do yellow filters allow through?

  Yellow light, red, and green wavelengths
• What do indigo filters transmit?

  Indigo wavelengths, blue, and red wavelengths
• What are the properties of opaque, transparent, and translucent objects?

  • Opaque: Do not transmit light; reflect or absorb all light.
  • Transparent: Transmit nearly all light; very see-through.
  • Translucent: Transmit some light; visibility depends on light proportion.
• How do color filters work?

  • Filter out specific colors of light.
  • Allow only certain wavelengths to pass.
  • Primary color filters transmit one primary color.