Lens 1

• What is the main function of lenses?

  To refract light and form an image
• What are the two main types of lenses?

  Converging and diverging lenses
• How does a converging lens affect parallel rays of light?

  It brings them together at the principal focus
• What shape does a converging lens have?

  It bulges outwards in the middle
• What is the effect of a diverging lens on parallel rays of light?

  It causes them to spread out
• What is another name for a diverging lens?

  Concave lens