Use online tools or animation to do virtual experiments with spherical mirrors and lenses. Move objects in the simulation and observe how the image changes.
In virtual simulations with spherical mirrors, different types of images are formed depending on the position of the object.
For concave mirrors, when the object is close, the image is erect and enlarged. As the object moves away, the image becomes inverted, initially enlarged then diminishing in size.
For convex mirrors, the image is always erect and diminished, with size slightly decreasing as object distance increases.
For lenses, convex lens shows erect, enlarged image when object is close; image becomes inverted at greater distances.
Concave lens always shows erect, diminished images.
The simulations confirm that image characteristics depend on object distance and the type of mirror or lens.
Explanation
The chapter describes these observations in Activities 10.3 and 10.9. The simulations allow students to virtually verify that concave mirrors and convex lenses can form different types of images (enlarged, diminished, erect, inverted) depending on object distance, while convex mirrors and concave lenses always form erect, diminished images.
Solution Steps
For concave mirrors: object close → erect and enlarged image; object far → inverted image that diminishes in size
For convex mirrors: image is always erect and diminished, size decreases slightly as object distance increases
For convex lens: object close → erect and enlarged image; object far → inverted image
For concave lens: image is always erect and diminished regardless of object position
Image characteristics (size, orientation) depend on object distance and the type of optical device used