Lenses
Ray diagram for biconvex and biconcave lenses.
Drag the point f (light blue) to change the focal length of the lens. Drag it to the opposite side of the lens to change the lens type.
Drag the point E (light blue) to change the location (horizontal drag) and height (vertical drag) of the object.
The thickness of the lens does NOT correspond to the focal length.
Lenses
Questions:
What phenomenon does the failure of all 3 lines to cross neatly at a single point demonstrate?
When is the image right side up?
When is the image real?
When is the image larger than the object?
What happens when you drag f through the lens to the other side? How is that related to the sign conventions for lenses?