Convex and Concave Lenses (Classroom)

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Lenses are all around us, for example like cameras, magnifiers, telescopes, and also extensively used for correcting vision defects such as hypermetropia and myopia.

What happens to sunlight passing through the convex lens? How is an image formed by a converging or diverging lens or mirror?

Originals-Convex and Concave Lenses activities begin with watching a Video-assisted Learning and then performing practice on how light interacts with convex and concave lenses.

Activities:

• Begin with Video-assisted Learning to help build background and knowledge about convex and concave lenses.
• Assessment: Look at the paths of the light rays, which type of lens/mirror is depicted in the diagram?
• Share Image: What are the applications of lenses in our daily life? Students add images using the Magic Box to participate in class. 
• Draw: With the given location of the object, draw the paths of light rays to predict where an image will be formed and what’s the type of the image.
• Ladder Shuffle: Randomly selects students to give the object distance and then figure out where the image is formed and what’s the type of the image.
• Predict: An object image will be formed by a convex lens with the given object distance. Put the proper image formations into the lenses.
• PhET Teaching Resources: Use Geometric Optics Interactive Simulations to explain how an image is formed by a (converging or diverging) lens or mirror using ray diagrams.

💡 PhET: founded in 2002 by Nobel Laureate Carl Wieman, the PhET Interactive Simulations project at the University of Colorado Boulder creates free interactive math and science simulations. PhET sims are based on extensive education research and engage students through an intuitive, game-like environment where students learn through exploration and discovery. (https://phet.colorado.edu )