Concept explainers
Stick a pin into a piece of cardboard and place two mirrors at right angles near the pin as shown in the top view diagram below.
1. Describe what you observe.
2. View the arrangement from several locations and use the method of parallax to place a pin at each of the image locations.
3. Suppose that one of the mirrors were removed. Predict which image(s) you would still see and which image(s) would vanish.
Check your predictions. If any of your predictions were incorrect, resolve the conflict before continuing.
4. On the diagram above, sketch a ray diagram that accounts for each image.
Describe how one of the images differs from the others.
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