Concave lens

Geometric Optics by PhET Interactive Simulations, University of Colorado Boulder, licensed under CC-BY-4.0 (https://phet.colorado.edu)

The title of the Project: Concave lens

Purpose of the work:

• Obtain image with concave lens.

Practical part

Choose “Lens” to start the virtual experiment. 

This is a little instruction to the virtual experiment.

Virtual experiment.

Step 1. Choose settings at shown in the picture below.

Step 2. Put the object outside of the focal point. Describe the image. The image is upright, virtual, and smaller than the object. 

Step 3. Put the object onto the focal point. Describe the image. The image is upright, virtual, and smaller than the object.

 

Step 4. Put the object between the focal point and the lens. Describe the image. The image is upright, virtual, and smaller than the object.

Step 5. Make a conclusion.

Conclusion

Images from concave lenses are always the same, namely, they are upright, virtual, and smaller than the object.