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Covered Lens

Demonstrates that typical key rays shown in diagrams are not the only ones contributing to image formation. You can also illustrate that real images are inverted.
ID: d0005
Set up time:
1 minutes in class.
Requires:
Electrical outlet and extension cord. Components.
Notes:
You may need assistance the first time you use this demo.This demo should be presented within the framework of PEOE (Predict, Explain, Observe, Explain).The explanations should be given in terms of ray diagrams.
Figures: PicPatch
Documents:
Comments:

Table of Components

Qty. name location notes
1 Light source W106; South Shelves;
1 Large lens holder W106; North Cabinets; U3-L1
1 Large Biconvex Lens W106; North Cabinets; U3-L1
1 Piece of cardboard to partially cover the lens
1 Projection screen Typically a wall in the classroom
pic_1
Fig 1. Covered Lens demo
pic_2
Fig 2.