Visible Light & Colour

• What is visible light made up of?

  A spectrum of different colors
• Which color has the longest wavelength?

  Red
• Which color has the shortest wavelength?

  Violet
• What acronym can help remember the order of colors in the spectrum?

  Roy G. Biv
• Are white and black part of the visible light spectrum?

  No, they are not
• What does white light consist of?

  A combination of all wavelengths
• What does blackness represent?

  An absence of light
• What determines the color an object appears?

  The wavelengths of light hitting it
• What are opaque objects?

  Objects that don't transmit any light
• Why does a gas appear blue?

  It reflects blue wavelengths of light
• How might cheese appear yellow?

  By reflecting yellow or red and green wavelengths
• What do transparent objects do with light?

  They transmit lots of light
• How do translucent objects differ from transparent ones?

  They only transmit some of the light
• What determines the color of a translucent object?

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

  It transmits green wavelengths most
• What is the function of color filters?

  To filter out particular colors
• What does a primary color filter do?

  Allows one primary color to pass through
• What happens when white light passes through a green filter?

  Only the green wavelength gets through
• How would white paper appear through a green filter?

  It would appear green
• What happens to a blue object viewed through a green filter?

  It would appear black
• What do yellow filters allow to pass through?

  Yellow light, red, and green wavelengths
• What do indigo filters allow to pass through?

  Indigo wavelengths, blue, and red
• What are the key concepts related to how objects appear in color?

  • Visible light is a spectrum of colors.
  • Color appearance depends on light wavelengths and object properties.
  • Opaque objects reflect absorbed wavelengths.
  • Transparent objects transmit light.
  • Translucent objects transmit some light.
  • Color filters transmit specific wavelengths.
• What are the differences between opaque, transparent, and translucent objects?

  • Opaque: Do not transmit light; reflect or absorb all.
  • Transparent: Transmit nearly all light; see-through.
  • Translucent: Transmit some light; partially see-through.
• How do primary color filters work?

  • Allow one primary color to pass.
  • Block other colors.
  • Example: Green filter allows green light.
• How do color filters affect the appearance of objects?

  • Filters change the wavelengths that reach the eye.
  • Objects may appear different colors based on the filter.
  • Example: Blue object appears black through a green filter.