Convex Lenses: Focal Length and Optics Science Experiment

How can you find the focal length of a lens? Does the type of lens matter? This is a super simple procedure measure a lens' focal length. Comparing lenses of different focal lengths is easy using this activity. 

 

Questions Answered:

  • How do you find the focal length of a lens? 
  • How does the image from a lens with a long focal length compare to one with a short focal length?

 

Topics Addressed:

  • Convex lenses make real images. 
  • The focal length of lenses can be measured using their ability to make images. 
  • Lenses with long focal lengths make larger, dimmer images than those with shorter focal lengths.

 

Learn to use scientific equipment:

Converging (convex) lenses

 

Skills and Tasks involved:

Find the focal length of convergent lenses. 

 

Materials Needed

convex lens, concave lens, convex mirror, concave mirror

 

Preparation Time

none needed

 

NOTE: This activity is part of the Light, Optics, & Color Unit found here.

Convex Lenses: Focal Length and Optics Science Experiment

$3.00Price

    Answer Keys and Teacher Notes address most questions and issues that might arise in this study—you shouldn’t have to do any outside research unless you want to.

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