visible light & colour

• What is the main topic of today's video?

  Why objects appear the color they do
• What is visible light made up of?

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

  Red
• Which color has the highest frequency?

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

  Roy G. Biv
• Why aren't white and black considered colors on the spectrum?

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

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

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

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

  It reflects yellow or red and green wavelengths
• What do transparent objects do?

  They transmit most of the light hitting them
• How do translucent objects differ from transparent objects?

  They only transmit some of the light
• 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 is a primary color filter?

  A filter that transmits one primary color
• 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 through?

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

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

  • Visible light is a spectrum of colors.
  • Color appearance depends on light wavelengths and object properties.
  • Opaque objects reflect or absorb light.
  • Transparent objects transmit light.
  • Translucent objects transmit some light.
  • Color filters transmit specific wavelengths.
• What is the conclusion of the video?

  Hope it all made sense