Magnifying Glasses (T)

• What is the purpose of the video in the context of convex lenses?

  To explain how a convex lens can be used as a magnifying glass and how to calculate magnification.
• What are the properties of the image formed by a convex lens when the object is more than two focal lengths away?

  • Diminished
  • Inverted
  • Real
• What are the properties of the image formed by a convex lens when the object is between one and two focal lengths away?

  • Magnified
  • Inverted
  • Real
• What are the properties of the image formed by a convex lens when the object is less than one focal length away?

  • Magnified
  • Upright
  • Virtual
• How do we represent the path of rays that do not actually meet when using a convex lens?

  Dotted lines are used to extend the rays behind the lens.
• What is the equation used to calculate magnification?

  The magnification equals the image height divided by the object height.
• If an object has a height of 9.5 cm and the image height is 3.5 cm, what is the magnification?

  0.368
• What is the magnification if the image height is 3.5 cm and the object height is 0.5 cm?

  7
• What is the significance of the magnification ratio?

  • It is a ratio
  • It has no units